Endangered and Threatened Wildlife and Plants; Removal of the Gray Wolf in Wyoming From the Federal List of Endangered and Threatened Wildlife and Removal of the Wyoming Wolf Population's Status as an Experimental Population, 61782-61823 [2011-25359]
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Federal Register / Vol. 76, No. 193 / Wednesday, October 5, 2011 / Proposed Rules
Fish and Wildlife Service
50 CFR Part 17
[Docket No. FWS–R6–ES–2011–0039;
92220–1113–0000–C6]
RIN 1018–AX94
Endangered and Threatened Wildlife
and Plants; Removal of the Gray Wolf
in Wyoming From the Federal List of
Endangered and Threatened Wildlife
and Removal of the Wyoming Wolf
Population’s Status as an
Experimental Population
U.S. Fish and Wildlife Service,
Interior.
ACTION: Proposed rule; notice of a public
hearing.
AGENCY:
We, the U.S. Fish and
Wildlife Service (Service or USFWS),
are proposing to remove the gray wolf
(Canis lupus) in Wyoming from the List
of Endangered and Threatened Wildlife.
This rule focuses on the Wyoming
portion of the Northern Rocky Mountain
(NRM) Distinct Population Segment
(DPS), except where discussion of the
larger Greater Yellowstone Area (GYA)
or NRM metapopulation (a population
that exists as partially isolated sets of
subpopulations) is necessary to
understand impacts to wolves in
Wyoming. The best scientific and
commercial data available indicate that
wolves in Wyoming are recovered and
no longer meet the definition of
endangered or threatened under the
Endangered Species Act of 1973, as
amended (Act). Wyoming’s wolf
population is stable, threats are
addressed, and a post-delisting
monitoring and management framework
has been developed. However,
additional changes to Wyoming State
law and Wyoming Game and Fish
Commission regulations are necessary
for implementation. We expect the State
of Wyoming to adopt the necessary
statutory and regulatory changes within
the next several months. If this proposal
is finalized, the gray wolf would be
delisted in Wyoming, the nonessential
experimental population designation
would be removed, and future
management for this species, except in
National Parks and National Wildlife
Refuges, would be conducted by the
appropriate State or Tribal wildlife
agencies. We seek information, data,
and comments from the public about
this proposal including the postdelisting monitoring and management
framework.
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SUMMARY:
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Public Comments: We will
accept comments received or
postmarked on or before January 13,
2012. Please note that if you are using
the Federal eRulemaking Portal (see
ADDRESSES), the deadline for submitting
an electronic comment is 11:59 p.m.
Eastern Daylight Time on this date.
Public Hearing: We will hold a public
hearing on this proposed rule on
November 15, 2011, as well as an
informational open house immediately
preceding the public hearing. For more
information, see ‘‘Public Hearing and
Open House’’ in SUPPLEMENTARY
INFORMATION.
ADDRESSES: You may submit comments
by one of the following methods:
(1) Electronically: Go to the Federal
eRulemaking Portal: https://
www.regulations.gov. In the Enter
Keyword or ID box, enter FWS–R6–ES–
2011–0039, which is the docket number
for this rulemaking. Then, in the Search
panel at the top of the screen, under the
Document Type heading, check the box
next to Proposed Rules to locate this
document. You may submit a comment
by clicking on ‘‘Submit a Comment.’’
(2) By hard copy: Submit by U.S. mail
or hand-delivery to: Public Comments
Processing, Attn: FWS–R6–ES–2011–
0039, Division of Policy and Directives
Management, U.S. Fish and Wildlife
Service, 4401 N. Fairfax Drive, MS
2042–PDM, Arlington, VA 22203.
We will post all comments on https://
www.regulations.gov. This generally
means that we will post any personal
information you provide us (see ‘‘Public
Comments’’ in SUPPLEMENTARY
INFORMATION for more information).
FOR FURTHER INFORMATION CONTACT: For
information on wolves in the northern
Rocky Mountains see https://
www.fws.gov/mountain-prairie/species/
mammals/wolf/, or contact U.S. Fish
and Wildlife Service, Mountain-Prairie
Region Office, Ecological Services
Division, 134 Union Blvd., Lakewood,
CO 80228; telephone 303–236–7400.
Persons who use a telecommunications
device for the deaf (TDD) may call the
Federal Information Relay Service
(FIRS) at 800–877–8339.
SUPPLEMENTARY INFORMATION:
DATES:
DEPARTMENT OF THE INTERIOR
Public Comments
We intend that any final action
resulting from this proposed rule will be
based on the best scientific and
commercial data available and be as
accurate and as effective as possible.
Therefore, we request comments or
information from other concerned
government agencies, the scientific
community, industry, or any other
interested party concerning this
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proposed rule. Specifically, we request
information on the following questions:
(1) Is our description and analysis of
the biology, population, and
distribution accurate?
(2) Does the proposed rule provide
accurate and adequate review and
analysis of the factors relating to the
threats?
(3) Are the conclusions we reach,
including their projection of
maintenance of a viable population,
logical and supported by the evidence
provided?
(4) Did we include all the necessary
and pertinent literature to support our
assumptions, arguments, and
conclusions?
(5) Is it reasonable for us to conclude
that Wyoming’s approach to wolf
management is likely to maintain
Wyoming’s wolf population above
recovery levels?
(6) Is it reasonable for us to conclude
that Wyoming’s approach to wolf
management is likely to provide for
sufficient levels of gene flow (either
natural or human assisted) to prevent
genetic problems from negatively
impacting the GYA’s population or the
larger NRM metapopulation in a manner
that would meaningfully impact
viability?
You may submit your comments and
materials concerning this proposed rule
by one of the methods listed in
ADDRESSES. We will not accept
comments sent by e-mail or fax or to an
address not listed in ADDRESSES. If you
submit a comment via https://
www.regulations.gov, your entire
comment—including your personal
identifying information—will be posted
on the Web site. If you submit a
hardcopy comment that includes
personal identifying information, you
may request at the top of your document
that we withhold this information from
public review. However, we cannot
guarantee that we will be able to do so.
We will post all hardcopy comments on
https://www.regulations.gov.
Comments and materials we receive,
as well as supporting documentation we
used in preparing this proposed rule,
will be available for public inspection
on https://www.regulations.gov, or by
appointment, during normal business
hours, at the Mountain-Prairie Region
Office (see FOR FURTHER INFORMATION
CONTACT).
Public Hearing and Open House
Section 4(b)(5)(E) of the Act requires
that we hold one public hearing on the
proposal, if requested. In anticipation of
such a request, we have scheduled an
informational meeting (a brief
presentation about the proposed rule
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with a question-and-answer period)
from 4:30 p.m. to 6 p.m., and a public
hearing from 6:30 p.m. to 8:30 p.m., on
November 15, 2011, at the Robert A.
Peck Arts Center, Central Wyoming
College, 2660 Peck Avenue, Riverton,
WY 82501; 307–855–2000.
Anyone wishing to make an oral
statement at the public hearing for the
record is encouraged to provide a
written copy of their statement to us at
the hearing. In the event there is a large
attendance, the time allotted for oral
statements may be limited. Speakers can
sign up at the informational meeting
and hearing if they desire to make an
oral statement. Oral and written
statements receive equal consideration.
There are no limits on the length of
written comments submitted to us. If
you have any questions concerning the
public hearing or need reasonable
accommodations to attend and
participate in the public hearing, please
contact the Denver Regional Office’s
Ecological Service’s Division at 303–
236–7400 [see FOR FURTHER INFORMATION
CONTACT section below], as soon as
possible, but no later than 1 week before
the hearing date, to allow sufficient time
to process requests. Information
regarding the proposal is available in
alternative formats upon request.
Peer Review
In accordance with our joint policy on
peer review published in the Federal
Register on July 1, 1994 (59 FR 34270),
we intend to subject this proposal to
peer review. A peer review panel will
conduct this assessment. We anticipate
this assessment will be completed
during the public comment period and
posted online at https://
www.regulations.gov to allow for public
review and comment.
We will consider all comments and
information received during this
comment period on this proposed rule
during our preparation of a final
determination. Accordingly, the final
decision may differ from this proposal.
jlentini on DSK4TPTVN1PROD with PROPOSALS2
Table of Contents
Background
Delisting Wolves in Wyoming—The Focus
of This Rule
Previous Federal Actions
Reengaging Wyoming and Changes to Their
Wolf Management Plan
Species Description and Basic Biology
Recovery Planning and Implementation
Æ Recovery Planning and the Development
of Recovery Criteria
Æ Monitoring and Managing Recovery
Æ Recovery by State
Æ Recovery by Recovery Area
Æ Genetic Exchange Relative to Our
Recovery Criteria
Æ Conclusion on Progress Towards Our
Recovery Goals
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Summary of Factors Affecting the Species
Factor A. The Present or Threatened
Destruction, Modification, or
Curtailment of Its Habitat or Range
Æ Suitable Habitat
Æ Unoccupied Suitable Habitat
Æ Currently Occupied Habitat
Æ Potential Threats Affecting Habitat or
Range
Factor B. Overutilization for Commercial,
Recreational, Scientific, or Educational
Purposes
Æ Commercial or Recreational Uses
Æ Overutilization for Scientific or
Educational Purposes
Factor C. Disease or Predation
Æ Disease
Æ Natural Predation
Æ Human-caused Predation
Factor D. The Inadequacy of Existing
Regulatory Mechanisms
Æ National Park Service
Æ National Wildlife Refuges
Æ Tribal Lands
Æ Forest Service
Æ State Regulatory Mechanisms
Æ Environmental Protection Agency
Factor E. Other Natural or Manmade
Factors Affecting Its Continued Existence
Æ Public Attitudes Toward the Gray Wolf
Æ Genetic Considerations
Æ Poison
Æ Climate Change
Æ Catastrophic Events
Æ Impacts to Wolf Pack Social Structure as
a Result of Human-Caused Mortality
Conclusion (Including Cumulative Impacts)
Post-Delisting Monitoring
Effects of the Proposed Rule
Required Determinations
Clarity of the Rule
Paperwork Reduction Act
National Environmental Policy Act
Executive Order 13211
Government-to-Government Relationship
With Tribes
References Cited
Authority
List of Subjects in 50 CFR Part 17
Proposed Regulation Promulgation
Background
Delisting Wolves in Wyoming—The
Focus of This Rule
This proposed rule focuses on the
Wyoming portion of the NRM DPS,
except where discussion of the larger
GYA or NRM metapopulation is
necessary to understand impacts to
wolves in Wyoming. This rulemaking is
separate and independent from, but
additive to, the previous action delisting
wolves in the NRM DPS (74 FR 15123,
April 2, 2009; 76 FR 25590, May 5,
2011). We believe this approach is
appropriate given the Congressional
directive to reissue our 2009 delisting,
which created a remnant piece of the
NRM DPS. This approach is also
consistent with our 2009 delisting
determination which stated that ‘‘if
Wyoming were to develop a Serviceapproved regulatory framework it would
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be delisted in a separate rule’’ (74 FR
15123, April 2, 2009, p. 15155). This
proposal does not depend on, or
implicate our previous, separate action
to remove the other portions of the NRM
DPS from the List of Endangered and
Threatened Wildlife. Outside Wyoming,
this rule will not affect the status of the
gray wolf in the portions of the NRM
DPS under State laws or suspend any
other legal protections provided by State
law.
Previous Federal Actions
In 1967, we determined the eastern
timber wolf (C. l. lycaon) in the Great
Lakes region was threatened with
extinction (32 FR 4001, March 11,
1967). In 1973, we added the NRM gray
wolf (C. l. irremotus) to the U.S. List of
Endangered Fish and Wildlife (38 FR
14678, June 4, 1973). Both of these
listings were pursuant to the
Endangered Species Conservation Act of
1969. In 1974, these subspecies were
listed as endangered under the Act of
1973 (39 FR 1158, January 4, 1974). We
listed a third gray wolf subspecies, the
Mexican wolf (C. l. baileyi) as
endangered on April 28, 1976 (41 FR
17736) in Mexico and the southwestern
United States. In 1976, we listed the
Texas gray wolf subspecies (C. l.
monstrabilis) as endangered in Texas
and Mexico (41 FR 24062, June 14,
1976).
Due to questions about the validity of
subspecies classification at the time and
issues associated with the narrow
geographic scope of each subspecies, we
published a rule reclassifying the gray
wolf as endangered at the species level
(C. lupus) throughout the coterminous
48 States and Mexico (43 FR 9607,
March 9, 1978). The exception was
Minnesota, where the gray wolf was
reclassified to threatened. This rule also
provided assurance that this
reclassification would not alter our
intention to focus recovery on each
population as separate entities.
Accordingly, recovery plans were
developed for: The Great Lakes in 1978
(revised in 1992) (Service 1978, entire;
Service 1992, entire); the NRM region in
1980 (revised in 1987) (Service 1980,
entire; Service 1987, entire); and the
Southwest in 1982 (Service 1982,
entire). A revision to the southwest
recovery plan is now under way.
In 1994, we designated portions of
Idaho and Montana, and all of Wyoming
as nonessential experimental gray wolf
populations under section 10(j) of the
Act (50 CFR 17.84(i)), including the
Yellowstone Experimental Population
Area (59 FR 60252, November 22, 1994)
and the Central Idaho Experimental
Population Area (59 FR 60266,
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November 22, 1994). These designations
assisted us in initiating gray wolf
reintroductions in central Idaho and in
Yellowstone National Park (YNP). The
Yellowstone Experimental Population
Area included the entire State of
Wyoming. In 2005 and 2008, we revised
these regulations to provide increased
management flexibility for this
recovered wolf population in States and
on Tribal lands with Service-approved
post-delisting wolf management plans
(70 FR 1286, January 6, 2005; 73 FR
4720, January 28, 2008; 50 CFR
17.84(n)).
The NRM gray wolf population
achieved its numerical and
distributional recovery goals at the end
of 2000 (Service et al. 2011, Table 4).
The temporal portion of the recovery
goal was achieved in 2002 when the
numerical and distributional recovery
goals were exceeded for the third
successive year (Service et al. 2011,
Table 4). In light of this success, we
once reclassified and twice delisted all
or part of this population (68 FR 15804,
April 1, 2003; 73 FR 10514, February 27,
2008; 74 FR 15123, April 2, 2009).
These reclassification and delisting
rules were overturned by Federal
District courts (Defenders of Wildlife, et
al. v. Norton, et al., 354 F.Supp.2d 1156
(D. Or. 2005); National Wildlife
Federation, et al. v. Norton, et al., 386
F.Supp.2d 553 (D. Vt. 2005); Defenders
of Wildlife, et al. v. Hall, et al., 565
F.Supp.2d 1160 (D. Mont. 2008);
Defenders of Wildlife, et al. v. Salazar,
et al., 729 F.Supp.2d 1207 (D. Mont.
2010). Each of these rulemakings and
the subsequent litigation are discussed
below.
In 2003, we reclassified the
coterminous 48-State listing into three
DPSs including a threatened Western
DPS, a threatened Eastern DPS, and an
endangered Southwestern DPS (68 FR
15804, April 1, 2003). The Western DPS,
centered around the recovered NRM
gray wolf population, included
California, northern Colorado, Idaho,
Montana, Oregon, northern Utah,
Washington, and Wyoming. This rule
also removed the protections of the Act
for gray wolves in all or parts of 16
southern and eastern States where the
species historically did not occur.
Finally, this rule established a special
4(d) rule to respond to wolf-human
conflicts in areas not covered by
existing nonessential experimental
population rules. In 2005, the U.S.
District Courts in Oregon and Vermont
concluded that the 2003 final rule was
‘‘arbitrary and capricious’’ and violated
the Act (Defenders of Wildlife, et al. v.
Norton, et al., 354 F.Supp.2d 1156 (D.
Or. 2005); National Wildlife Federation,
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et al. v. Norton, et al., 386 F.Supp.2d
553 (D. Vt. 2005)). Both courts ruled the
Service improperly downlisted entire
DPSs based just on the viability of a core
population. The courts’ rulings
invalidated the April 2003 changes to
the gray wolf listing under the Act.
In 2003, we also published an
advanced notice of proposed
rulemaking announcing our intention to
delist the Western DPS as the recovery
goals had been satisfied (68 FR 15879,
April 1, 2003). This notice explained
that delisting would require
consideration of threats, and that the
adequacy of State wolf management
plans to address threats in the absence
of protections of the Act would be a
major determinant in any future
delisting evaluation.
In 2004, we determined that
Montana’s and Idaho’s laws and wolf
management plans were adequate to
assure that their shares of the NRM wolf
population would be maintained above
recovery levels (Williams 2004a, in litt.;
Williams 2004b, in litt.). However, we
also found the 2003 Wyoming
legislation and plan would not ensure
maintenance of Wyoming’s share of a
recovered NRM gray wolf population
(Williams 2004c, in litt.). Wyoming
challenged this determination, and the
United States District Court in Wyoming
dismissed the case (State of Wyoming, et
al. v. United States Department of
Interior, et al., 360 F.Supp.2d 1214, (D.
Wyoming 2005)). Wyoming’s
subsequent appeal was unsuccessful
(State of Wyoming, et al. v. United
States Department of Interior, et al., 442
F.Supp.3d 1262 (10th Cir. 2006)).
Wyoming lost this case on procedural
grounds because it failed to identify a
final agency action necessary to confer
standing prior to the litigation. To
address this procedural shortcoming, in
2005, Wyoming petitioned us to revise
the listing status for the gray wolf by
recognizing a NRM DPS and to remove
it from the Federal List of Endangered
and Threatened Species (Freudenthal
2005, entire). In 2006, we announced a
12-month finding that Wyoming’s
petition (delisting wolves in all of
Montana, Idaho, and Wyoming) was not
warranted because the 2003 Wyoming
State laws and its 2003 wolf
management plan did not provide
adequate regulatory mechanisms to
ensure that Wyoming’s share of a
recovered NRM wolf population would
be conserved (71 FR 43410, August 1,
2006). Wyoming challenged this finding
in Wyoming Federal District Court. This
challenge was made moot by Wyoming’s
revisions to its laws and management
plan in 2007, which allowed delisting to
move forward. On February 27, 2008, a
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Wyoming Federal District Court issued
an order dismissing the case (State of
Wyoming, et al. v. United States
Department of Interior, et al., U.S.
District Court Case No. 2:06–CV–00245).
In 2008, we issued a final rule
recognizing the NRM DPS and removing
it from the List of Endangered and
Threatened Wildlife (73 FR 10514,
February 27, 2008). This DPS included
Idaho, Montana, eastern Oregon, northcentral Utah, eastern Washington, and
Wyoming. This DPS was smaller than
the 2003 Western DPS and more closely
approximates the historic range of the
originally listed NRM gray wolf in the
United States and the areas focused on
in both NRM recovery plans (39 FR
1171, January 4, 1974; Service 1980, pp.
3, 7–8; Service 1987, pp. 2, 23). The
Service removed protections across the
entire DPS after Wyoming revised its
wolf management plan and State law. At
the time, we concluded this Wyoming
framework provided adequate
regulatory protections to conserve
Wyoming’s portion of a recovered wolf
population into the foreseeable future
(Hall 2007, in litt.).
Environmental litigants challenged
this final rule in the U.S. District Court
for the District of Montana. The
plaintiffs also moved to preliminarily
enjoin the delisting. On July 18, 2008,
the court granted the plaintiffs’ motion
for a preliminary injunction and
enjoined the Service’s implementation
of the final delisting rule (Defenders of
Wildlife, et al., v. Hall, et al., 565
F.Supp.2d 1160 (D. Mont. 2008)). The
court stated that we acted arbitrarily in
delisting a wolf population that lacked
evidence of natural genetic exchange
between subpopulations. The court also
stated that we acted arbitrarily and
capriciously when we approved
Wyoming’s 2007 wolf management plan
because the State failed to commit to
managing for at least 15 breeding pairs,
and Wyoming’s 2007 statute allowed the
Wyoming Game and Fish Commission
(WGFC) to diminish the trophy game
area if it ‘‘determines the diminution
does not impede the delisting of gray
wolves and will facilitate Wyoming’s
management of wolves.’’ In light of the
court order, on September 22, 2008, we
asked the court to vacate the final rule
and remand it to us. On October 14,
2008, the court granted our request
(Defenders of Wildlife v. Hall, 9:08–CV–
00056–DWM (D. Mont 2008)). The
court’s rulings invalidated the February
2008 rule designating and delisting the
NRM DPS.
Following the July 18, 2008 court
ruling, we reexamined the NRM DPS
and Wyoming’s statutes, regulations,
and management plan. This
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reevaluation considered several issues
not considered in the previous
evaluation. We determined that the best
scientific and commercial data available
demonstrated that: (1) The NRM DPS
was not threatened or endangered
throughout ‘‘all’’ of its range (i.e., not
threatened or endangered throughout all
of the DPS); and (2) the Wyoming
portion of the range represented a
significant portion of its range where the
species remained in danger of extinction
because of the inadequacy of existing
regulatory mechanisms. Thus, on April
2, 2009, we published a final rule
recognizing the NRM DPS and removing
the DPS from the List of Endangered
and Threatened Wildlife, except in
Wyoming, where wolves continued to
be regulated as a nonessential,
experimental population under 50 CFR
17.84(i) and (n) (74 FR 15123). The
decision to retain the Act’s protections
only in Wyoming was consistent with a
March 16, 2007, Memorandum Opinion
issued by the Solicitor of the
Department of the Interior, ‘‘The
Meaning of ‘In Danger of Extinction
Throughout All or a Significant Portion
of Its Range’ ’’ (M–Opinion) (Department
of the Interior 2007, in litt.). The final
rule determined that Wyoming’s
existing regulatory framework did not
provide the necessary regulatory
mechanisms to assure that Wyoming’s
share of a recovered NRM wolf
population would be conserved if the
protections of the Act were removed
and stated that, until Wyoming revised
its statutes, regulations, and
management plan, and obtained Service
approval, wolves in Wyoming would
remain protected by the Act (74 FR
15123, April 2, 2009).
The April 2009 rule (74 FR 15123,
April 2, 2009) was challenged in the
U.S. District Court for the District of
Montana by environmental litigants and
in the U.S. District Court for the District
of Wyoming by the State of Wyoming,
the Wyoming Wolf Coalition, and Park
County, Wyoming. On August 5, 2010,
the U.S District Court for Montana ruled
on the merits of the case and vacated
our April 2009 final rule (Defenders of
Wildlife, et al. v. Salazar, et al., 729 F.
Supp.2d 1207 (D. Mont. 2010)). The
court concluded that the NRM DPS
must be listed or delisted in its entirety.
The court rejected the rule’s approach
allowing protection of only a portion of
the species’ range because it was
inconsistent with the Act’s definition of
‘‘species.’’ (The Department of Interior
withdrew the M-Opinion on this topic
on May 4, 2011 (Department of the
Interior 2011, in litt.)). Thus, before
delisting could occur, Wyoming had to
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develop a regulatory framework that
was determined by the Service to be
adequate to maintain Wyoming’s share
of a recovered NRM gray wolf
population. The court’s ruling
invalidated the April 2009 rule
designating and delisting most of the
NRM DPS.
On October 26, 2010, in compliance
with the order of the U.S. District Court
for Montana, we published a final rule
notifying the public that the Federal
protections in place prior to the 2009
delisting had been reinstated (75 FR
65574). Wolves in eastern Washington,
eastern Oregon, northcentral Utah, the
Idaho panhandle, and northern Montana
were again listed as endangered. Former
special rules designating the gray wolf
in the remainder of Montana and Idaho
as nonessential experimental
populations were likewise reinstated.
Additionally, the NRM gray wolf DPS
established by the April 2, 2009, final
rule was set aside. Because wolves in
Wyoming were not delisted by the April
2, 2009 final rule, their listed status was
not impacted by the October 26, 2010
rule.
Following the Montana District Court
decision, the United States Congress
passed, and President Obama signed,
H.R. 1473, Public Law 112–10—The
Department of Defense and Full Year
Continuing Appropriations Act of 2011.
Section 1713 of the law directed the
Service to reissue its April 2009
delisting rule. The Service complied
with this directive on May 5, 2011 (76
FR 25590). The constitutionality of H.R.
1473 was challenged by environmental
plaintiffs (Alliance for the Wild Rockies
et al., v. Salazar, et al., case no. CV 11–
70–M–DWM). The United States District
Court for Montana ruled on August 3,
2011, that the law was constitutional.
This ruling was appealed to the Ninth
Circuit (Alliance for the Wild Rockies, et
al., v. Salazar, et al., case no. 11–35670).
Plaintiffs also filed an emergency
motion for injunction in order to stop
Idaho’s and Montana’s planned fall
2011 hunts, which was denied. As of
this writing, a decision on the appeal is
pending.
As for the Wyoming challenge to the
April 2009 partial delisting rule (74 FR
15123, April 2, 2009), a United States
District Court for Wyoming ruled in
favor of the three Wyoming plaintiffs on
November 18, 2010 (Wyoming et al., v.
U.S. Department of the Interior, et al.,
2010 U.S. Dist. LEXIS 122829). The
court rejected the Service position that
recommended the entire State of
Wyoming be designated as a trophy
game area and found this position to be
arbitrary and capricious, as it was not
supported by the administrative record.
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The court concluded that the record
indicated only northwestern Wyoming,
which has the vast majority of the
State’s suitable habitat, was biologically
essential to maintenance of the NRM
population. However, the court did not
render an opinion on whether
Wyoming’s current plan, including the
proposed size and location of its 2007
trophy game area, was sufficient.
Instead, the court remanded the matter
to us to reconsider whether Wyoming’s
regulatory framework would maintain
its share of a recovered wolf population
and provide adequate genetic
connectivity. Subsequent to this order,
the Service and the State reinitiated
negotiations on revisions to their wolf
management framework that would
satisfy the standards of the Act and
allow delisting to again move forward.
The results of this process led to
development of a revised wolf
management plan and are incorporated
in this proposal.
Reengaging Wyoming and Changes to
Their Wolf Management Plan
The April 2009 rule stated that ‘‘until
Wyoming revises their statutes,
management plan, and associated
regulations, and is again Service
approved, wolves in Wyoming continue
to require the protections of the Act’’ (74
FR 15123, April 2, 2009). This rule
specifically expressed concern over: (1)
The size and permanency of Wyoming’s
Wolf Trophy Game Management Area
(WTGMA); (2) conflicting language
within the State statutes concerning
whether Wyoming would manage for at
least 15 breeding pairs and at least 150
wolves, exactly 15 breeding pairs and
150 wolves, or only 7 breeding pairs and
70 wolves; and (3) liberal depredation
control authorizations and legislative
mandates to aggressively manage the
population down to minimum levels.
In early 2011, we began discussions
with Wyoming seeking to develop a
strategy for each of these issues. In
August 2011, the Service and the State
of Wyoming announced the framework
of an agreement that we believe will
allow us to delist wolves in Wyoming
(WGFC 2011, appendix I). Following
this announcement, Wyoming revised
their 2008 wolf management plan
(WGFC 2008, entire) to reflect the terms
of this agreement (WGFC 2011, entire).
Below we summarize the key points in
the agreement relative to the three
overarching Service concerns
highlighted above.
First, this agreement commits
Wyoming to make permanent the
existing WTGMA. In total, Wyoming
wolves will be permanently managed as
game animals or protected (e.g., in
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National Parks) in about 40,000 km2
(15,400 mi2) in the northwestern portion
of the State (15.7 percent of Wyoming),
including YNP, Grand Teton National
Park, John D. Rockefeller Memorial
Parkway, adjacent U.S. Forest Servicedesignated Wilderness Areas, adjacent
public and private lands, the National
Elk Refuge, and the Wind River Indian
Reservation (Lickfett 2011, in litt.).
Wolves will be designated as predatory
animals in the remainder of the State
(predator area). The above protected and
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game areas (see Figure 1) include: 100
percent of the portion of the GYA
recovery area within Wyoming (Service
1987, Figure 2); approximately 79
percent of the portion of the primary
analysis area in Wyoming focused on by
the 1994 reintroduction EIS (Service
1994, Figure 1.1); the entire home range
for 24 of 27 breeding pairs in Wyoming
and 24 of 34 packs in the State (Service
et al. 2011, Figure 3); and approximately
76 percent of the State’s suitable habitat
as determined by Oakleaf et al. (2006,
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entire) (including 81 percent of the
high-quality habitat (with an 80 percent
or greater chance of supporting wolves)
and 62 percent of the medium-highquality habitat (with a 50 to 79 percent
chance of supporting wolves) (Oakleaf
2011, in litt.)). This area is of sufficient
size to support a recovered wolf
population in Wyoming, under the
management regime proposed for this
area.
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The Service’s prior concern that the
size of the WTGMA would impact
natural connectivity and genetic
exchange was also addressed in the
agreement. The agreement and the
State’s wolf management plan clearly
articulate a goal for gene flow of at least
one effective natural migrant per
generation entering into the GYA, as
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measured over multiple generations
(WGFC 2011, pp. 4, 9, 26–29, 54). To
address our concerns about genetics and
connectivity, Wyoming agreed to a
seasonal expansion of the WTGMA.
This seasonal adjustment expands the
WTGMA approximately 80 kilometers
(km) (50 miles (mi)) south for four and
a half months during peak wolf
dispersal periods (WGFC 2011, pp. 2, 8,
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52). We believe this will benefit natural
dispersal. Furthermore, Wyoming
commits to an adaptive management
approach that adjusts management if the
above minimum level of gene flow is
not documented, as well as to use
human-assisted migration if necessary
(WGFC 2011, pp. 26–29). Collectively,
these measures will ensure that
inbreeding depression resulting from
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the loss of genetic diversity never
threatens the population.
Next, Wyoming agreed to maintain a
population of at least 10 breeding pairs
and at least 100 wolves in areas under
State jurisdiction (WGFC 2011, pp. 1–5,
16–26, 52). Importantly, this
commitment does not reflect an
intention by Wyoming Game and Fish
Department (WGFD) to reduce the
population down to this minimum
population level. Rather, Wyoming
intends to maintain an adequate buffer
above minimum population objectives
to accommodate management needs (the
desire to hunt wolves annually) and
ensure uncontrollable sources of
mortality (such as disease or take in
defense of property) do not drop the
population below this minimum
population level (WGFC 2011, p. 24).
This management strategy will provide
for the population’s representation,
resiliency, and redundancy (Shaffer and
Stein 2000, entire) within the GYA as
well as improve public acceptance for
wolves outside YNP.
The wolf populations in YNP and on
the lands of sovereign nations will
provide an additional buffer above the
minimum recovery goal intended by the
step-down management objective of at
least 15 breeding pairs and at least 150
wolves Statewide (see ‘‘Recovery
Planning and Implementation’’ below
for more information). From 2001 to the
end of 2010, the wolf population in YNP
ranged from 96 to 171 wolves, and
between 6 to 16 breeding pairs, with an
average of 9.8 breeding pairs. While a
lower long-term future population level
in YNP is predicted (Smith 2010, pers.
comm.), YNP will always provide a
large, secure wolf population providing
a safety margin above the minimum
recovery goal. The Wind River Indian
Reservation typically contains a small
number of wolves (single digits), which
sometimes form packs that count toward
Tribal population totals. On the whole,
we expect the statewide wolf population
in Wyoming will be maintained well
above minimum recovery levels.
Another substantial improvement is
Wyoming’s management framework
inside the WTGMA. For example,
Wyoming has committed to remove
current statutory mandates for
aggressive management of wolves
(WGFC 2011, pp. 24, 52). Current
Wyoming law requires aggressive
management until the population
outside the National Parks falls to six
breeding pairs or below. This issue was
a major Service concern with
Wyoming’s existing law, and will be
remedied.
Additionally, Wyoming agreed wolves
in the permanent or seasonal WTGMA
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would never be treated as predatory
animals (WGFC 2011, pp. 3, 16–17, 23).
Existing State laws allow depredating
wolves within the WTGMA to be treated
as predatory animals under certain
circumstances at the discretion of the
State Fish and Game Commission
(WGFC 2011, pp. 3, 16–17, 23).
Wyoming has indicated an intention to
modify W.S. 23–1–302(a)(ii) to ensure it
does not apply to wolves in the
WTGMA. This change is a substantial
improvement over current Wyoming
law that will help ensure that the wolf
population in Wyoming (outside of YNP
and the Wind River Indian Reservation)
always remains at or above 10 breeding
pairs and 100 individuals.
Furthermore, Wyoming intends to
establish defense-of-property
regulations that are similar to our
nonessential experimental population
rules (50 CFR 17.84(n)) (WGFC 2011,
pp. 4, 22–23, 30–31, 53). Also,
management of depredating wolves will
be similar to Service management under
the Act’s protections (WGFC 2011, pp.
4, 22–23, 30–31, 53). Such rules were in
place in Montana and Idaho prior to
delisting and allowed continued
population growth. These management
approaches are an additional
improvement over the framework
Wyoming had in place for most of 2008.
These, and other improvements
discussed in more detail below, have
addressed the Service’s concerns about
wolf management in Wyoming and
made this proposed delisting rule
possible. Wyoming’s wolf management
plan was recently revised to reflect the
new agreement (WGFC 2011, entire).
However, conforming changes to
Wyoming State law and WGFC
regulations are also necessary to
implement this plan. Wyoming
recognizes statutory and regulatory
changes will be required to implement
this agreement and intends to pursue
these changes. These changes will be
made prior to any final decision that
delists gray wolves in Wyoming.
Species Description and Basic Biology
Gray wolves (Canis lupus) are the
largest wild members of the dog family
(Canidae). Adult gray wolves range from
18–80 kilograms (kg) (40–175 pounds
(lb)) depending upon sex and
geographic region (Mech 1974, p. 1). In
the NRM region, adult male gray wolves
average just over 45 kg (100 lb), but may
weigh up to 60 kg (130 lb). Females
weigh about 20 percent less than males.
Wolves’ fur color is frequently a grizzled
gray, but it can vary from pure white to
coal black (Gipson et al. 2002, p. 821).
Gray wolves have a circumpolar range
including North America, Europe, and
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Asia. As Europeans began settling the
United States, they poisoned, trapped,
and shot wolves, causing this oncewidespread species to be eradicated
from most of its range in the 48
conterminous States (Mech 1970, pp.
31–34; McIntyre 1995, entire). Gray wolf
populations were eliminated from
Montana, Idaho, and Wyoming, as well
as adjacent southwestern Canada by the
1930s (Young and Goldman 1944,
p. 414).
Wolves primarily prey on medium
and large mammals. Wolf prey in the
NRM region is composed mainly of elk
(Cervus canadensis), white tailed deer
(Odocoileus virginianus), mule deer
(Odocoileus hemionus), moose (Alces
alces), and (in the GYA) bison (Bison
bison). Bighorn sheep (Ovis canadensis),
mountain goats (Oreamnos americanus),
and pronghorn antelope (Antilocapra
americana) also are common but less
important, at least to date, as wolf prey.
Wolves normally live in packs of 2 to
12 animals. In the NRM region, pack
sizes average 7 wolves but are slightly
larger in protected areas. A few complex
packs have been substantially bigger in
some areas of YNP (Smith et al. 2006,
p. 243; Service et al. 2011, Tables 1–3).
Packs typically occupy large distinct
territories from 518 to 1,295 square
kilometers (km2) (200 to 500 square
miles (mi2)) and defend these areas from
other wolves or packs. Once a given area
is occupied by resident wolf packs, it
becomes saturated and wolf numbers
become regulated by the amount of
available prey, intra-species conflict,
other forms of mortality, and dispersal.
Dispersing wolves may cover large areas
as they try to join other packs or attempt
to form their own pack in unoccupied
habitat (Mech and Boitani 2003, pp. 11–
17).
Typically, only one male and female
in each pack breed and produce pups
(Packard 2003, p. 38; Smith et al. 2006,
pp. 243–4; Service et al. 2011, Tables 1–
3). Females and males typically begin
breeding as 2-year-olds and may
annually produce young until they are
over 10 years old. In the NRM region,
litters are typically born in mid to late
April and range from 1 to 7 pups, but
average around 5 pups (Service et al.
1989–2011, Tables 1–3). Most years,
four pups survive until winter (Service
et al. 1989–2011, Tables 1–3). Wolves
can live 13 years (Holyan et al. 2005, p.
446), but the average lifespan in the
NRM region is less than 4 years (Smith
et al. 2006, p. 245). Pup production and
survival can increase when wolf density
is lower and food availability per wolf
increases (Fuller et al. 2003, p. 186).
Pack social structure is very adaptable
and resilient. Breeding members can be
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quickly replaced either from within or
outside the pack, and pups can be
reared by another pack member should
their parents die (Packard 2003, p. 38;
Brainerd et al. 2008; Mech 2006, p.
1482). Consequently, wolf populations
can rapidly recover from severe
disruptions, such as very high levels of
human-caused mortality or disease.
After severe declines, wolf populations
can more than double in just 2 years if
mortality is reduced; increases of nearly
100 percent per year have been
documented in low-density suitable
habitat (Fuller et al. 2003, pp. 181–183;
Service et al. 2011, Table 4).
For detailed information on the
biology of this species see the ‘‘Biology
and Ecology of Gray Wolves’’ section of
the April 1, 2003, final rule to reclassify
and remove the gray wolf from the list
of endangered and threatened wildlife
in portions of the conterminous United
States (2003 Reclassification Rule) (68
FR 15804).
Recovery Planning and Implementation
This section discusses recovery
planning and implementation.
Specifically, this section includes a
detailed discussion of the recovery
criteria including their development,
continuous evaluation, and revision as
necessary. Finally, this section includes
our summary of progress towards
recovery including an assessment of
whether the criteria are met. This
section discusses the entire NRM
population because the recovery criteria
apply to the entire population.
Recovery Planning and the
Development of Recovery Criteria—
Shortly after the gray wolf was listed,
we formed the Interagency Wolf
Recovery Team to complete a recovery
plan for the NRM population (Service
1980, p. i; Fritts et al. 1995, p. 111). The
NRM Wolf Recovery Plan (recovery
plan) was approved in 1980 (Service
1980, p. i) and revised in 1987 (Service
1987, p. i). Recovery plans are not
regulatory documents, but are instead
intended to provide guidance to the
Service, States, and other partners on
methods of minimizing threats to listed
species and on criteria that may be used
to determine when recovery is achieved.
There are many paths to accomplishing
recovery of a species, and recovery may
be achieved without all criteria being
fully met. For example, one or more
criteria may have been exceeded while
other criteria may not have been
accomplished. In that instance, the
Service may judge that the threats have
been minimized sufficiently, and the
species is robust enough to reclassify
from endangered to threatened or to
delist. In other cases, recovery
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opportunities may have been recognized
that were not known at the time the
recovery plan was finalized. These
opportunities may be used instead of
methods identified in the recovery plan.
Likewise, information on the species
may be learned that was not known at
the time the recovery plan was
finalized. The new information may
change the extent that criteria need to be
met for recognizing recovery of the
species. Recovery of a species is a
dynamic process requiring adaptive
management that may, or may not, fully
follow the guidance provided in a
recovery plan.
The 1980 recovery plan’s objective
was to reestablish and maintain viable
populations of the NRM wolf (C. l.
irremotus) in its former range where
feasible (Service 1980, p. iii). This plan
did not include recovery goals (i.e.,
delisting criteria). The 1980 plan
covered an area similar to the NRM
DPS, as it was once believed to be the
range of the purported NRM wolf
subspecies. It recommended that
recovery actions be focused on the large
areas of public land in northwestern
Montana, central Idaho, and the GYA.
The 1987 revised recovery plan (Service
1987, p. 57) concluded that the
subspecies designations may no longer
be valid and simply referred to gray
wolves in the NRM region. Consistent
with the 1980 plan, it also
recommended focusing recovery actions
on the large blocks on public land in the
NRM region.
The 1987 plan specified a recovery
criterion of a minimum of 10 breeding
pairs of wolves (defined as 2 wolves of
opposite sex and adequate age, capable
of producing offspring) for a minimum
of 3 successive years in each of 3
distinct recovery areas including: (1)
Northwestern Montana (Glacier
National Park; the Great Bear, Bob
Marshall, and Lincoln Scapegoat
Wilderness Areas; and adjacent public
and private lands); (2) central Idaho
(Selway-Bitterroot, Gospel Hump, Frank
Church River of No Return, and
Sawtooth Wilderness Areas; and
adjacent, mostly Federal, lands); and (3)
the YNP area (including the AbsarokaBeartooth, North Absaroka, Washakie,
and Teton Wilderness Areas; and
adjacent public and private lands). That
plan recommended that wolf
establishment not be promoted outside
these distinct recovery areas, but it
encouraged connectivity between
recovery areas. However, no attempts
were made to prevent wolf pack
establishment outside of the recovery
areas unless chronic conflict required
resolution (Service 1994, pp. 1–15, 16;
Service 1999, p. 2). Since completion of
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the 1987 recovery plan, we have
expended considerable effort to
develop, repeatedly reevaluate, and
when necessary modify, the recovery
goals (Service 1987, p. 12; Service 1994,
Appendix 8 and 9; Fritts and Carbyn
1995, p. 26; Bangs 2002, p. 1; 73 FR
10514, February 27, 2008; 74 FR 15123,
April 2, 2009, and this proposed rule).
The 1994 Environmental Impact
Statement on The Reintroduction of
Gray Wolves to Yellowstone National
Park and Central Idaho (EIS) reviewed
wolf recovery in the NRM region and
the adequacy of the recovery goals to
assure that the 1987 goals were
sufficient (Service 1994, pp. 6:68–78).
We were particularly concerned about
the 1987 definition of a breeding pair,
since any male and female wolf are
‘capable’ of producing offspring and
lone wolves may not have territories.
We also believed the relatively small
recovery areas identified in the 1987
plan greatly reduced the amount of area
that could be used by wolves and would
almost certainly eliminate the
opportunity for meaningful natural
demographic and genetic connectivity.
We conducted a thorough literature
review of wolf population viability
analysis and minimum viable
populations, reviewed the recovery
goals for other wolf populations,
surveyed the opinions of the top 43 wolf
experts in North America (of which 25
responded), and incorporated our own
expertise into a review of the NRM wolf
recovery goal. We published our
analysis in the EIS and a peer-reviewed
paper (Service 1994, Appendix 8 & 9;
Fritts and Carbyn 1995, pp. 26–38).
Our 1994 analysis concluded that the
1987 recovery goal was, at best, a
minimum recovery goal, and that
modifications were warranted on the
basis of more recent information about
wolf distribution, connectivity, and
numbers. We also concluded ‘‘Data on
survival of actual wolf populations
suggest greater resiliency than indicated
by theory’’ and theoretical treatments of
population viability ‘‘have created
unnecessary dilemmas for wolf recovery
programs by overstating the required
population size’’ (Fritts and Carbyn
1995, p. 26). Based on our analysis, we
redefined a breeding pair as an adult
male and an adult female wolf that have
produced at least 2 pups that survived
until December 31 of the year of their
birth, during the previous breeding
season. We also concluded that ‘‘Thirty
or more breeding pairs comprising some
300+ wolves in a metapopulation (a
population that exists as partially
isolated sets of subpopulations) with
genetic exchange between
subpopulations should have a high
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probability of long-term persistence’’
because it would contain enough
individuals in successfully reproducing
packs that were distributed over distinct
but somewhat connected large areas, to
be viable for the longterm (Service 1994,
p. 6:75). We explicitly stated the
required genetic exchange could occur
by natural means or by human-assisted
migration management and that
dispersal of wolves between recovery
areas was evidence of that genetic
exchange (Service et al. 1994, Appendix
8, 9). In defining a ‘‘Recovered Wolf
Population’’ we found ‘‘in the northern
Rockies a recovered wolf population is
10 breeding pairs of wolves in each of
3 areas for 3 successive years with some
level of movement between areas’’
(Service 1994, pp. 6–7). We further
determined that a metapopulation of
this size and distribution among the
three areas of core suitable habitat in the
NRM DPS would result in a wolf
population that would fully achieve our
recovery objectives.
For more than 15 years, we have
concluded that movement of
individuals between the metapopulation
segments could occur either naturally or
by human-assisted migration
management (Service 1994, pp. 7–67).
Specifically, the 1994 EIS stated ‘‘The
importance of movement of individuals
between sub-populations cannot be
overemphasized. The dispersal ability of
wolves makes such movement likely,
unless wolves were heavily exploited
between recovery areas, as could
happen in the more developed corridor
between central Idaho and YNP.
Intensive migration management might
become necessary if 1 of the 3 subpopulations should develop genetic or
demographic problems.’’ (Service 1994,
pp. 7–67). The finding went on to say
that human-assisted migration should
not be viewed negatively and would be
necessary in other wolf recovery
programs (Service 1994, pp. 7–67).
Furthermore, we found that the 1987
wolf recovery plan’s population goal of
10 breeding pairs of wolves in 3
separate recovery areas for 3
consecutive years was reasonably sound
and would maintain a viable wolf
population into the foreseeable future.
We did caution that the numerical
recovery goal was somewhat
conservative, and should be considered
minimal (Service 1994, pp. 6–75).
We conducted another review of what
constitutes a recovered wolf population
in late 2001 and early 2002 to reevaluate
and update our 1994 analysis and
conclusions (Service 1994, Appendix 9).
We attempted to resurvey the same 43
experts we had contacted in 1994 as
well as 43 other biologists from North
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America and Europe who were
recognized experts about wolves and
conservation biology. We asked experts
with a wide diversity of perspectives to
participate in our review. In total, 53
people provided their expert opinion
regarding a wide range of issues related
to the NRM recovery goal. We also
reviewed a wide range of literature,
including wolf population viability
analyses from other areas (Bangs 2002,
pp. 1–9).
Despite varied professional opinions
and a great diversity of suggestions,
experts overwhelmingly thought the
recovery goal derived in our 1994
analysis was more biologically
appropriate than the 1987 recovery
plan’s criteria for recovery and
represented a viable and recovered wolf
population. Reviewers also thought
genetic exchange, either natural or
human-facilitated, was important to
maintaining the metapopulation
configuration and wolf population
viability. Reviewers also believed the
proven ability of a breeding pair to show
successful reproduction was a necessary
component of a biologically meaningful
breeding pair definition. Reviewers
recommended other concepts/numbers
for recovery goals, but most were slight
modifications to those we recommended
in our 1994 analysis. While experts
strongly (78 percent) supported our
1994 conclusions regarding a viable
wolf population, they also tended to
believe that wolf population viability
was enhanced by higher, rather than
lower, population levels and longer,
rather than shorter, demonstrated
timeframes.
A common minority recommendation
was an alternative goal of 500 wolves
and 5 years. A slight majority of
reviewers indicated that even the 1987
recovery goal of only 10 breeding pairs
(defined as a male and female capable
of breeding) in each of 3 distinct
recovery areas may be viable, given the
persistence of other small wolf
populations in other parts of the world.
The results of previous population
viability analyses for other wolf
populations varied widely, and as we
had concluded in our 1994 analysis,
reviewers in 2002 concluded theoretical
results were strongly dependent on the
variables and assumptions used in such
models and conclusions often predicted
different outcomes than actual empirical
data had conclusively demonstrated.
Based on that review, we reaffirmed our
more relevant and stringent 1994
definition of wolf breeding pairs,
population viability, and recovery
(Service 1994, p. 6:75; Bangs 2002, pp.
1–9).
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We measure the wolf recovery goal by
the number of breeding pairs as well as
by the number of wolves because wolf
populations are maintained by packs
that successfully raise pups. We use
‘‘breeding pairs’’ (packs that have at
least one adult male and at least one
adult female and that raised at least two
pups until December 31) to describe
successfully reproducing packs (Service
1994, p. 6:67; Bangs 2002, pp. 7–8;
Mitchell et al. 2008, p. 881; Mitchell et
al. 2010, p. 101). The breeding pair
metric includes most of the important
biological concepts in wolf
conservation, including the potential
disruption of human-caused mortality
that might affect breeding success in
social carnivores (Brainerd et al. 2008,
p. 89; Wallach et al. 2009, p. 1; Creel
and Rotella 2010, p. 1). Specifically, we
thought it was important for breeding
pairs to have: both male and female
members together going into the
February breeding season; successful
occupation of a distinct territory
(generally 500–1,300 km2 (200–500 mi2)
and almost always in suitable habitat;
enough pups to replace themselves;
offspring that become yearling
dispersers; at least four wolves
following the point in the year with the
highest mortality rates (summer and
fall); all social structures and age classes
represented within a wolf population;
and adults that can raise and mentor
younger wolves.
We also have determined that an
equitable distribution of wolf breeding
pairs and individual wolves among the
three States and the three recovery
zones is an essential part of achieving
recovery. Like peer reviewers in 1994
and 2002, we concluded that NRM wolf
recovery and long-term wolf population
viability is dependent on its distribution
as well as maintaining the minimum
numbers of breeding pairs and wolves.
While uniform distribution is not
necessary, a well-distributed population
with no one State/recovery area
maintaining a disproportionately low
number of packs or number of
individual wolves is needed. This
approach will maintain wolf
distribution in and adjacent to all three
recovery areas and most of the region’s
suitable habitat. Such an approach will
facilitate natural connectivity.
Following the 2002 review of our
recovery criteria, we began to use States,
in addition to recovery areas, to measure
progress toward recovery goals (Service
et al. 2003–2011, Table 4). Because
Montana, Idaho, and Wyoming each
contain the vast majority of one of the
original three core recovery areas, we
determined the metapopulation
structure would be best conserved by
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equally dividing the overall recovery
goal between the three States (73 FR
10514, February 27, 2008, p. 10522).
This approach made each State’s
responsibility for wolf conservation fair,
consistent, and clear. It avoided any
possible confusion that one State might
assume the responsibility for
maintaining the required number of
wolves and wolf breeding pairs in a
shared recovery area that was the
responsibility of the adjacent State.
State regulatory authorities and
traditional management of resident
game populations occur on a State-byState basis. We determined that
management by State would still
maintain a robust wolf population in
each core recovery area because they
each contain manmade or natural
refugia from human-caused mortality
(e.g., National Parks, wilderness areas,
and remote Federal lands) that
guarantee those areas remain the
stronghold for wolf breeding pairs and
source of dispersing wolves in each
State. Recovery targets by State promote
connectivity and genetic exchange
between the metapopulation segments
by avoiding management that focuses
solely on wolf breeding pairs in
relatively distinct core recovery areas.
This approach also will increase the
numbers of potential wolf breeding
pairs in the GYA because it is shared by
all three States. A large and welldistributed population within the GYA
is especially important because it is the
most isolated recovery segment within
the NRM DPS (Oakleaf et al. 2005, p.
554; vonHoldt et al. 2007, p. 19) and the
southern tip of a larger western gray
wolf population that now contains more
than 14,000 wolves when combined
with western Canada (Boitani 2003,
p. 322).
The numerical component of the
recovery goal represents the minimum
number of breeding pairs and individual
wolves needed to achieve and maintain
recovery. To ensure that the NRM wolf
population always exceeds the recovery
goal of 30 breeding pairs and 300
wolves, we required that each State
manage for at least 15 breeding pairs
and at least 150 wolves in mid-winter in
accordance with a step-down
management objective. This 50 percent
safety margin above minimum recovery
levels was intended to provide an
adequate safety margin recognizing that
all wildlife populations, including
wolves, can fluctuate widely over a
relatively short period of time.
Managing for a buffer above the
minimum recovery target is consistent
with our 1994 determination that the
addition of a few extra pairs would add
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security to the population and should be
considered in the post-EIS management
planning (Service 1994, pp. 6–75).
Additionally, because the recovery goal
components are measured in mid-winter
when the wolf population is near its
annual low point, the average annual
wolf population will be higher than
these minimal goals.
Because Wyoming, unlike Montana
and Idaho, has a large portion of its wolf
population in areas outside the State’s
control (e.g., YNP and the Wind River
Indian Reservation), we developed an
alternative approach for Wyoming to
achieve the desired safety margin above
the minimum recovery goal.
Specifically, we determined that at least
10 breeding pairs and at least 100
wolves at mid-winter in Wyoming
outside YNP and the Wind River Indian
Reservation will satisfy Wyoming’s
contribution to NRM gray wolf recovery.
Under this approach, the wolf
populations in YNP and the Wind River
Indian Reservation will provide the
remaining buffer above the minimum
recovery goal intended by the stepdown management objective employed
in Montana and Idaho (i.e., population
targets 50 percent above minimum
recovery levels).
Wyoming’s wolf population will be
further buffered because WGFD intends
to maintain an adequate buffer above
minimum population objectives to
accommodate management needs and
ensure uncontrollable sources of
mortality do not drop the population
below the 10 breeding pair and 100 wolf
minimum population level. The State of
Wyoming is also committed to
coordinate with YNP and the Wind
River Indian Reservation to contribute
to the step-down recovery target of at
least 15 breeding pairs and at least 150
wolves statewide, including YNP and
the Wind River Indian Reservation. In
our view, this alternative approach to
the step-down wolf population target in
Wyoming is biologically superior to a
single statewide standard in that: It
provides population stability outside
the park, minimizing the chances of a
bad year in YNP compromising
maintenance of the recovery goal (such
a scenario is described in our 2009
delisting rule’s analysis of Wyoming’s
2007 wolf plan (74 FR 15123, April 2,
2009)); It adds an extra layer of
representation, resiliency, and
redundancy to the Greater Yellowstone
Area’s gray wolf population; and it
builds public acceptance for a minimum
wolf population outside YNP.
To summarize, based on the
information above, the current recovery
goal for the NRM gray wolf population
is: Thirty or more breeding pairs (an
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adult male and an adult female that
raise at least 2 pups until December 31)
comprising 300+ wolves welldistributed between Montana, Idaho,
and Wyoming functioning as a
metapopulation (a population that exists
as partially isolated sets of
subpopulations) with genetic exchange
(either natural or, if necessary, agencymanaged) between subpopulations. This
overarching NRM recovery goal is
stepped-down by State. The step-down
recovery target requires Montana and
Idaho to each maintain at least 10
breeding pairs and at least 100 wolves
by managing for a safety margin of at
least 15 breeding pairs and at least 150
wolves in mid-winter. In Wyoming, the
step-down recovery target is at least 10
breeding pairs and at least 100 wolves
primarily within the State’s jurisdiction
while the YNP and the Wind River
Indian Reservation provide the
remainder of the buffer above the
minimum recovery goal. Our recovery
and post-delisting management goals
were designed to provide the NRM gray
wolf population with sufficient
representation, resilience, and
redundancy for their long-term
conservation. After evaluating all
available information, we conclude that
the best scientific and commercial
information available indicates the
population will remain viable following
delisting if the recovery targets continue
to be met.
Monitoring and Managing Recovery—
In 1989, we formed an Interagency Wolf
Working Group (Working Group)
composed of Federal, State, and Tribal
agency personnel (Bangs 1991, p. 7;
Fritts et al. 1995, p. 109; Service et al.
1989–2009, p. 1). The Working Group
conducted four basic recovery tasks
(Service et al. 1989–2009, pp. 1–2), in
addition to the standard enforcement
functions associated with the take of a
listed species. These tasks were: (1)
Monitor wolf distribution and numbers;
(2) control wolves that attacked
livestock by moving them, conducting
other nonlethal measures, or by killing
them (Bangs et al. 2006, p. 7); (3)
conduct research and publish scientific
publications on wolf relationships to
ungulate prey, other carnivores and
scavengers, livestock, and people; and
(4) provide accurate science-based
information to the public and mass
media so that people could develop
their opinions about wolves and wolf
management from an informed
perspective.
The size and distribution of the wolf
population is estimated by the Working
Group each year and, along with other
information, is published in an
interagency annual report (Service et al.
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1989–2009, Table 4, Figure 1). Since the
early 1980s, the Service and our
cooperating partners have radio-collared
and monitored approximately 2,000
wolves in the NRM region to assess
population status, conduct research, and
to reduce/resolve conflict with
livestock. The Working Group’s annual
population estimates represent the best
scientific and commercial data available
regarding year-end NRM gray wolf
population size and trends, as well as
distributional and other information.
Recovery by State—At the end of
2000, the NRM population first met its
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overall numerical and distributional
recovery goal of a minimum of 30
breeding pairs and more than 300
wolves well-distributed among
Montana, Idaho, and Wyoming (68 FR
15804, April 1, 2003; Service et al. 2011,
Table 4). Because the recovery goal must
be achieved for 3 consecutive years, the
temporal element of recovery was not
achieved until the end of 2002 when
663 wolves and 49 breeding pairs were
present (Service et al. 2003, Table 4). By
the end of 2010, the NRM wolf
population achieved its numerical and
distributional recovery goal for 11
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consecutive years (Service et al. 2001–
2008, Table 4; 68 FR 15804, April 1,
2003; 71 FR 6634, February 8, 2006). By
the end of 2010, the NRM gray wolf
population included approximately
1,651 wolves (566 in Montana; 705 in
Idaho; 343 in Wyoming; 16 in eastern
Washington; 21 in eastern Oregon) in
111 breeding pairs (35 in Montana; 46
in Idaho; 27 in Wyoming; 1 in
Washington; 2 in Oregon). Distribution
at the end of 2010 is illustrated in
Figure 2. Population trends through the
end of 2010 are illustrated in Figure 3.
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Recovery by Recovery Area—As
discussed previously, after the 2002
peer review of the wolf recovery efforts,
we began using States, in addition to
recovery areas, to measure progress
toward recovery goals (Service et al.
2003–2011, Table 4). However, because
the 1987 Recovery Plan (Service 1987,
pp. v, 12, 23) included goals for core
recovery areas we have included the
following discussion on the history of
the recovery efforts and status of these
core recovery areas, including how the
wolf population’s distribution and
metapopulation structure is important
to maintaining its viability and how the
biological characteristics of each core
recovery area differ (Service et al. 2011,
Table 4).
The Northwestern Montana Recovery
Area’s 84,800 km2 (33,386 mi2)
includes: Glacier National Park; the
Great Bear, Bob Marshall, and Lincoln
Scapegoat Wilderness Areas; and
adjacent public and private lands in
northern Montana and the northern
Idaho panhandle. Wolves in this
recovery area were listed and managed
as endangered species. Wolves naturally
recolonized this area from Canada.
Reproduction first occurred in
northwestern Montana in 1986 (Ream et
al. 1989, entire). The natural ability of
wolves to find and quickly recolonize
empty habitat (Mech and Boitani 2003,
pp. 17–19), the interim control plan
(Service 1988, 1999, entire), and the
interagency recovery program combined
to effectively promote an increase in
wolf numbers (Bangs 1991, pp. 7–13).
By 1996, the number of wolves had
grown to about 70 wolves in 7 known
breeding pairs. However, from 1996
through 2004, the estimated number of
breeding pairs and wolves in
northwestern Montana fluctuated at a
low level, partly due to actual
population size and partly due to
limited monitoring effort. However,
since 2005, it has steadily increased
(Service et al. 2011, Table 4). In 2010,
we estimated 374 wolves in 24 breeding
pairs in the northwestern Montana
recovery area (Service et al. 2011, Table
4).
The Northwestern Montana Recovery
Area has sustained fewer wolves than
the other recovery areas because there is
less suitable habitat and it is more
fragmented (Oakleaf et al. 2005. p. 560;
Smith et al. 2010, p. 622). Some of the
variation in our wolf population
estimates for northwestern Montana is
also due to the difficulty of counting
wolves in the area’s thick forests.
Wolves in northwestern Montana also
prey mainly on white-tailed deer,
resulting in smaller packs and
territories, which lower the chances of
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detecting a pack (Bangs et al. 1998, p.
878). Increased monitoring efforts in
northwestern Montana by Montana
Fish, Wildlife and Parks (MFWP) since
2005 were likely responsible for more
accurate population estimates. Wolf
numbers in 2003 and 2004 also likely
exceeded 10 breeding pairs and 100
wolves, but were not documented
simply due to less intensive monitoring
those years (Service et al. 2011, Table 4).
By the end of 2010, this recovery area
contained more than 10 breeding pairs
and 100 wolves for the sixth
consecutive year (2005–2010), and
probably did so the last 9 years (2002–
2010) (Service et al. 2011, Table 4).
Routine dispersal of wolves has been
documented among northwestern
Montana, central Idaho, and adjacent
Canadian populations demonstrating
that northwestern Montana’s wolves are
demographically and genetically linked
to both the wolf population in Canada
and in central Idaho (Pletscher et al.
1991, pp. 547–548; Boyd and Pletscher
1999, pp. 1105–1106; Sime 2007, p. 4;
vonHoldt et al. 2010, p. 4412; Jimenez
et al. 2011, p. 1). Because of fairly
contiguous but fractured suitable
habitat, wolves dispersing into
northwestern Montana from both
directions will continue to join or form
new packs and supplement this segment
of the overall wolf population (Forbes
and Boyd 1996, p. 1082; Forbes and
Boyd 1997, p. 1226; Boyd et al. 1995, p.
140; vonHoldt et al. 2007, p. 19;
vonHoldt et al. 2010; Thiessen 2007, p.
50; Sime 2007, p. 4, Jimenez et al. 2011,
p. 1).
Unlike YNP or the central Idaho
Wilderness complex, northwestern
Montana lacks a large core refugium that
contains large numbers of overwintering
wild ungulates and few livestock.
Therefore, wolf numbers may not ever
be as high in northwestern Montana as
they are in the central Idaho or the GYA
recovery areas. However, that
population segment has persisted for
nearly 20 years, is robust today, and
habitat there is capable of supporting
hundreds of wolves (Service et al. 2011,
Table 4). State management, pursuant to
the Montana State wolf management
plan (2003), will ensure this population
segment continues to thrive (see Factor
D).
The Central Idaho Recovery Area’s
53,600 km2 (20,700 mi2) includes: The
Selway-Bitterroot, Gospel Hump, Frank
Church River of No Return, and
Sawtooth Wilderness Areas; adjacent,
mostly Federal lands, in central Idaho;
and adjacent parts of southwestern
Montana (Service 1994, p. iv). In
January 1995, 15 young adult wolves
from Alberta, Canada, were released in
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central Idaho (Bangs and Fritts 1996, p.
409; Fritts et al. 1997, p. 7). In January
1996, an additional 20 wolves from
British Columbia were released (Bangs
et al. 1998, p. 787). Central Idaho
contains the greatest amount of highly
suitable wolf habitat compared to either
northwestern Montana or the GYA
(Oakleaf et al. 2005, p. 559).
Consequently, the central Idaho area
population has grown substantially and
expanded its range since reintroduction.
As in the Northwestern Montana
Recovery Area, some of the Central
Idaho Recovery Area’s increase in its
wolf population estimate beginning in
2005 was likely due to an increased
monitoring effort by Idaho Department
of Fish and Game (IDFG). In 2010, the
population appears to have declined,
but some of the estimated decline was
likely due to difficult monitoring
conditions in the most remote and
inaccessible areas of central Idaho. We
estimated 739 wolves in 47 breeding
pairs in the central Idaho recovery area
at the end of 2010 (Service et al. 2011,
Table 4). This recovery area has
contained at least 10 breeding pairs and
100 wolves for 13 consecutive years
(1998–2010) (Service et al. 2011; Table
4).
The GYA recovery area (63,700 km2
(24,600 mi2)) includes portions of
southeastern Montana, eastern Idaho,
and northwestern Wyoming. Portions of
Wyoming that are occupied by wolves
(Figure 1 above) include: most of YNP,
Grand Teton National Park, and John D.
Rockefeller Memorial Parkway; the
Absaroka Beartooth, Bridger,
Fitzpatrick, Gros Ventre, Jedediah
Smith, North Absaroka, Popo Agie,
Teton, Washakie, and Winegar Hole
Wilderness Areas; the Dubois Badlands,
Owl Creek, Scab Creek, and Whiskey
Mountain Wilderness Study Areas; and
adjacent public and private lands
(Service 1994, p. iv). Much of the
wilderness portions of the GYA are
primarily used seasonally by wolves
due to high elevation, deep snow, and
low productivity (in terms of sustaining
year-round wild ungulate populations)
(Service et al. 2011, Figure 3). In 1995,
14 wolves representing 3 family groups
from Alberta were released in YNP
(Bangs and Fritts 1996, p. 409; Fritts et
al. 1997, p. 7; Phillips and Smith 1996,
pp. 33–43). In 1996, this procedure was
repeated with 17 wolves representing 4
family groups from British Columbia.
Finally, 10 pups were removed from
northwestern Montana in a wolf control
action and released in YNP in the spring
of 1997 (Bangs et al. 1998, p. 787). Two
of these pups became breeding adults
and their genetic signature is common
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both in YNP and the GYA (VonHoldt et
al. 2008, entire; vonHoldt et al. 2010, p.
4421). We estimated 501 wolves were in
37 breeding pairs in the GYA at the end
of 2010 (Service et al. 2011, Table 4). By
the end of 2010, this recovery area had
at least 10 breeding pairs and 100
wolves for 11 consecutive years (2000–
2010) (Service et al. 2011, Table 4).
Wolf numbers in the GYA were
relatively stable from 2007 through
2009, as were breeding pairs (Service et
al. 2011, Table 4). The GYA population
grew to 501 wolves and 37 breeding
pairs in 2010, primarily because
numbers of wolves outside YNP in
Wyoming grew while wolves in YNP
have declined from 171 wolves in 16
known breeding pairs in 2004 to 97
wolves in 7 breeding pairs in 2010
(Service et al. 2005, 2011, Tables 2, 4).
This decline likely occurred because: (1)
Highly suitable habitat in YNP was
saturated with wolf packs; (2) conflict
among packs appeared to limit
population density; (3) fewer elk occur
in YNP than when reintroduction took
place (White and Garrott 2006, p. 942;
Vucetich et al. 2005, p. 259); and (4)
suspected outbreaks of disease in 2005
and 2008 (canine distemper (CD) or
possibly canine parvovirus (CPV))
reduced pup survival to 20 percent)
(Service et al. 2006, 2009, 2011, Table
2; Smith et al. 2006, p. 244; Smith and
Almberg 2007, pp. 17–20: Almberg et al.
2010, p. 2058). Since 2008, YNP has
also seen a relatively high number of
wolves killing other wolves and a high
mortality rate among pups. YNP
predicts wolf numbers in YNP may
decline further and settle into a lower
equilibrium long term (Smith 2010,
pers. comm.). Additional significant
growth in the National Park and
Wilderness portions of the Wyoming
wolf population above 150 wolves is
unlikely because suitable wolf habitat is
saturated with resident wolf packs.
Maintaining wolf populations safely
above recovery levels and promoting
demographic and genetic exchange in
the GYA segment of the NRM DPS will
depend on wolf packs living outside the
National Park and Wilderness portions
of northwestern Wyoming and
southwestern Montana (vonHoldt et al.
2010, p. 4422).
Genetic Exchange Relative to our
Recovery Criteria—Finally, as noted
above, the recovery criteria requires the
NRM DPS function as a metapopulation
(a population that exists as partially
isolated sets of subpopulations) with
genetic exchange between
subpopulations. The available data
conclusively demonstrate that this
portion of the recovery criteria (i.e.,
‘‘genetic exchange’’) is met. Specifically,
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vonHoldt et al. (2010, p. 4412)
demonstrated 5.4 effective migrants per
generation among all three
subpopulations from 1995 through 2004
when the NRM region contained
between 101 and 846 wolves. This issue
is discussed further in Factor E below.
Conclusion on Progress Towards our
Recovery Goals—Given the above best
available scientific and commercial
information, we consider all prongs of
the recovery criteria met. The numeric
and distributional components of the
overarching recovery goal has been
exceeded for 11 consecutive years.
Furthermore, Montana, Idaho, and
Wyoming have each individually met or
exceeded the minimum per-State
recovery targets every year since at least
2002 and met or exceeded the stepdown management goals every year
since at least 2004. It is also worth
noting that each of the recovery areas
(which were originally used to measure
progress towards recovery) have been
documented at or above 10 breeding
pairs and 100 wolves every year since
2005 (and probably exceeded these
levels every year since 2002) (Service et
al. 2011, Table 4). Finally, the available
evidence demonstrates that the NRM
gray wolf population is functioning as a
metapopulation with robust levels of
gene flow between subpopulations.
Thus, we consider the population
recovered.
Summary of Factors Affecting the
Species
Section 4 of the Act (16 U.S.C. 1533)
and implementing regulations (50 CFR
part 424) set forth procedures for adding
species to, removing species from, or
reclassifying species on the Federal
Lists of Endangered and Threatened
Wildlife and Plants. Under section
4(a)(1) of the Act, a species may be
determined to be endangered or
threatened based on any of the
following five factors: (A) The present or
threatened destruction, modification, or
curtailment of its habitat or range; (B)
Overutilization for commercial,
recreational, scientific, or educational
purposes; (C) Disease or predation; (D)
The inadequacy of existing regulatory
mechanisms; or (E) Other natural or
manmade factors affecting its continued
existence. We must consider these same
five factors in delisting decisions (50
CFR 424.11(d)). However, in delisting
decisions, this analysis of threats is an
evaluation of both the threats currently
facing the species and the threats that
are reasonably likely to affect the
species in the foreseeable future
following the delisting and the removal
or reduction of the Act’s protections.
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In considering what factors might
constitute threats, we must look beyond
the exposure of the species to a
particular factor to evaluate whether the
species may respond to the factor in a
way that causes actual impacts to the
species. If there is exposure to a factor
and the species responds negatively, the
factor may be a threat, and during the
status review, we attempt to determine
how significant a threat it is. The threat
is significant if it drives or contributes
to the risk of extinction of the species
such that the species warrants listing as
endangered or threatened as those terms
are defined by the Act. However, the
identification of factors that could
impact a species negatively may not be
sufficient to compel a finding that the
species warrants listing. The
information must include evidence
sufficient to suggest that the potential
threat is likely to materialize and that it
has the capacity (i.e., it should be of
sufficient magnitude and extent) to
affect the species’ status such that it
meets the definition of endangered or
threatened under the Act.
Given the above, the following
analysis examines the five factors
affecting, or likely to affect, Wyoming
wolves within the foreseeable future.
This analysis includes a discussion of
the larger GYA or NRM metapopulation,
which is necessary to understand
impacts to wolves in Wyoming.
Factor A. The Present or Threatened
Destruction, Modification, or
Curtailment of Its Habitat or Range
This analysis evaluates the entire
State of Wyoming, and within Wyoming
we focus primarily on suitable habitat,
currently occupied areas, and the
WTGMA. Within Wyoming, we also
examine unsuitable habitat. Habitat
suitability is based on biological
features that impact the ability of wolf
packs to persist. Outside of Wyoming,
this analysis looks at areas between the
three recovery areas to inform our
understanding of current and future
connectivity, with particular focus on
the central Idaho to GYA dispersal
corridor. We analyze a number of
potential threats to wolf habitat
including increased human populations
and development (including oil and
gas), connectivity, ungulate populations,
and livestock grazing.
Suitable Habitat—Wolves once
occupied or transited all of Wyoming.
However, much of the wolf’s historical
range within this area has been
modified for human use. While lone
wolves can travel through, or
temporarily live, almost anywhere
(Jimenez et al. 2011, p. 1), much of
Wyoming is no longer suitable habitat to
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support wolf packs and wolf breeding
pairs (Oakleaf et al. 2006, p. 559; Carroll
et al. 2006, p. 32). We have reviewed the
quality, quantity, and distribution of
habitat relative to the biological
requirements of wolves. In doing so, we
reviewed two models, Oakleaf et al.
(2006, pp. 555–558) and Carroll et al.
(2003, pp. 536–548; 2006, pp. 27–31), to
help us gauge the current amount and
distribution of suitable wolf habitat in
Wyoming. Both models ranked habitat
as ‘‘suitable’’ if they had characteristics
that indicated they might have a 50
percent or greater chance of supporting
wolf packs. Suitable wolf habitat was
typically characterized in both models
as public land with mountainous,
forested habitat that contains abundant
year-round wild ungulate populations,
low road density, low numbers of
domestic livestock that are only present
seasonally, few domestic sheep, low
agricultural use, and few people.
Unsuitable wolf habitat was typically
just the opposite (i.e., private land, flat
open prairie or desert, low or seasonal
wild ungulate populations, high road
density, high numbers of year-round
domestic livestock including many
domestic sheep, high levels of
agricultural use, and many people).
Despite their similarities, these two
models had differences in the area
analyzed, layers, inputs, and
assumptions. As a result, the Oakleaf et
al. (2006, p. 559) and Carroll et al.
(2006, p. 33) models predicted different
amounts of theoretically suitable wolf
habitat in areas examined by both
models.
Oakleaf’s model was a more intensive
effort that looked at potential wolf
habitat in the NRM region (Oakleaf et al.
2005, p. 555). To comprise its
geographic information system layers,
the model used roads accessible to twowheel and four-wheel vehicles,
topography (slope and elevation), land
ownership, relative ungulate density
(based on State harvest statistics), cattle
(Bos sp.) and sheep density, vegetation
characteristics (ecoregions and land
cover), and human density. Oakleaf
analyzed the characteristics of areas
occupied and not occupied by NRM
wolf packs through 2000 to predict what
other areas in the NRM region might be
suitable or unsuitable for future wolf
pack formation (Oakleaf et al. 2005, p.
555). In total, Oakleaf et al. (2006, p.
559) ranked 28,725 km2 (11,091 mi2) as
suitable wolf habitat in Wyoming.
Carroll’s model analyzed a much
larger area (all 12 western States and
northern Mexico) in a less specific way
than Oakleaf’s model (Carroll et al.
2006, pp. 27–31). Carroll’s model used
density and type of roads, human
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population density and distribution,
slope, and vegetative greenness to
estimate relative ungulate density to
predict associated wolf survival and
fecundity rates (Carroll et al. 2006, p.
29). These factors were used to develop
estimates of habitat theoretically
suitable for wolf pack persistence. In
addition, Carroll predicted the potential
effect of increased road development
and human density expected by 2025 on
suitable wolf habitat (Carroll et al. 2006,
pp. 30–31). In total, Carroll et al. (2006,
pp. 27–31) ranked 77,202 km2 (29,808
mi2) in Wyoming as suitable habitat.
According to the Carroll model,
approximately 30 percent of Wyoming
would be ranked as suitable wolf habitat
(Carroll et al. 2006, pp. 27–31).
The Carroll et al. (2006, pp. 31–34)
model tended to be more generous than
the Oakleaf (et al. 2006, pp. 558–560)
model in identifying suitable wolf
habitat. Based on empirical wolf data
over our 17 years of experience in
Wyoming, we have determined
Oakleaf’s projections were more
realistic. However, due to the large area
analyzed, Carroll’s model provided a
valuable relative measure across the
western United States upon which
comparisons could be made. The Carroll
model did not incorporate livestock
density into its calculations as the
Oakleaf model did (Carroll et al. 2006,
pp. 27–29; Oakleaf et al. 2005, p. 556).
Thus, that model did not consider those
conditions where wolf mortality is high
and habitat unsuitable because of
chronic conflict with livestock. A
growing body of literature suggests, per
individual, wolves cause more
economic damage to livestock than any
other large predator in North America
(Oakleaf et al. 2003, p. 299; Collinge
2008, p. 129; Ashcroft et al. 2009, p. 1;
Muhly et al. 2010, p. 1243; Sommers et
al. 2010, p. 1425; Breck et al. 2011, p.
1). During the past 17 years, Wyoming
wolf packs have been unable to persist
in areas intensively used for livestock
production, primarily because of agency
control of problem wolves and illegal
killing.
Many of the more isolated primary
habitat patches that the Carroll model
predicted as currently suitable were
predicted to be unsuitable by the year
2025, indicating they were likely on the
lower end of what ranked as suitable
habitat in that model (Carroll et al. 2006,
p. 32). Because these areas were
typically too small to support breeding
pairs and too isolated from the core
population to receive enough dispersing
wolves to overcome high mortality rates,
we do not believe these areas are
currently suitable habitat based upon
our data on Wyoming wolf pack
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persistence for the past 17 years (Bangs
1991, p. 9; Bangs et al. 1998, p. 788;
Service et al. 1999–2011, Figure 1).
Despite differences in each model’s
analysis area, layers, inputs, and
assumptions, both models predicted
that most suitable wolf habitat in
Wyoming was in the GYA, which is the
area currently occupied by wolves in
Wyoming. These models are useful in
understanding the relative proportions
and distributions of various habitat
characteristics and their relationships to
wolf pack persistence. Both models
generally support our earlier predictions
about wolf habitat suitability in the
GYA (Service 1980, p. 9; 1987, p. 7;
1994, p. vii). Because theoretical models
only define suitable habitat as those
areas that have characteristics with a
50 percent or greater probability of
supporting wolf packs, the acreages of
suitable habitat that they indicate can be
successfully occupied are only
estimates.
The Carroll et al. (2006, p. 25) model
also indicated that the GYA and
neighboring population centers had
habitat suitable for dispersal between
them, and such habitat would remain
relatively intact in the future. However,
the GYA is the most isolated (Oakleaf et
al. 2005, p. 554). This conclusion is
supported by dispersal and genetic
exchange data (vonHoldt et al. 2010, p.
4420; Jimenez et al. 2011, p. 1).
Collectively, the NRM DPS’s three core
areas are surrounded by large areas of
habitat unsuitable for pack persistence
(Service et al. 1999–2011, Figure 1). We
note that some surrounding habitat that
is considered unsuitable for pack
persistence is still important for
maintaining effective migration through
natural dispersal.
Overall, we evaluated data from a
number of sources on the location of
suitable wolf habitat in developing our
estimate of currently suitable wolf
habitat. Specifically, we considered the
recovery areas identified in the 1987
wolf recovery plan (Service 1987, p. 23),
the primary analysis areas analyzed in
the 1994 EIS for the GYA (63,700 km2
(24,600 mi2) (Service 1994, p. iv),
information derived from theoretical
models by Carroll et al. (2006, p. 25) and
Oakleaf et al. (2006, p. 554), our 17
years of field experience managing
wolves in Wyoming, and locations of
persistent wolf packs and breeding pairs
since recovery has been achieved
(Service et al. 1999–2011, Figure 1).
Collectively, this evidence leads us to
concur with the Oakleaf et al. (2006, p.
559) model’s predictions that the most
important habitat attributes for wolf
pack persistence are forest cover, public
land, high elk density, and low livestock
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density. Therefore, we believe that
Oakleaf’s calculations of the amount
and distribution of suitable wolf habitat
available for persistent wolf pack
formation, in the parts of Wyoming
analyzed, represents the most
scientifically accurate prediction of
suitable wolf habitat in Wyoming
(Oakleaf et al. 2006, p. 559).
Generally, Wyoming’s suitable habitat
is located in the northwestern portion of
the State. A comparison of actual wolf
pack distribution in 2009 and 2010
(Service et al. 2010; 2011, Figure 1) to
Oakleaf et al.’s (2006, p. 559) prediction
of suitable habitat, indicates that nearly
all suitable habitat in Wyoming is
currently occupied and areas predicted
to be unsuitable remain largely
unoccupied. Of note, the permanent
WTGMA (the only portion of Wyoming
predicted to have resident wolf packs
post-delisting) contains 76 percent of
the suitable habitat in Wyoming, which
includes 81 percent of Wyoming’s highquality habitat (greater than 0.8) and 62
percent of Wyoming’ medium-highquality habitat (0.5–0.799) (Oakleaf
2011, in litt.).
Although Carroll determined there
may be some additional suitable wolf
habitat in Wyoming beyond the area
Oakleaf analyzed, we believe it is
marginally suitable at best, and is
insignificant to NRM DPS, GYA, or
Wyoming wolf population recovery,
because it occurs in small, isolated, and
fragmented areas and is unlikely to
support many, if any, persistent
breeding pairs. While some areas in
Wyoming predicted to be unsuitable
habitat by the above models have been
temporarily occupied and used by
wolves or even packs, we still consider
these areas as largely unsuitable habitat
because wolf packs in such areas have
failed to persist long enough to be
categorized as breeding pairs and
successfully contribute toward recovery.
Therefore, we consider such areas as
unsuitable habitat and conclude that
dispersing wolves attempting to
colonize those areas are unlikely to form
breeding pairs, persist long enough to
raise yearlings that can disperse to
facilitate demographic and genetic
exchange within the NRM DPS, or
otherwise contribute to population
recovery.
Unoccupied Suitable Habitat—
Habitat suitability modeling indicates
that the GYA and central Idaho core
recovery areas are atypical of other
habitats in the western United States
because suitable wolf habitat in these
areas occurs in much larger contiguous
blocks (Service 1987, p. 7; Larson 2004,
p. 49; Carroll et al. 2006, p. 35; Oakleaf
et al. 2005, p. 559). Such core refugia
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areas provide a steady source of
dispersing wolves that populate other
adjoining potentially suitable wolf
habitat. Some habitat ranked by models
as suitable adjacent to this core refugia
may be able to support wolf breeding
pairs, while other habitat farther away
from a strong source of dispersing
wolves may not be able to support
persistent packs. This fact is important
when considering suitable habitat as
defined by the Carroll et al. (2006, p. 30)
and Oakleaf et al. (2006, p. 559) models,
because wolf populations can persist
despite very high rates of mortality only
if they have high rates of immigration
(Fuller et al. 2003, p. 183). Therefore,
model predictions regarding habitat
suitability do not always translate into
successful wolf occupancy and wolf
breeding pairs, just as habitat predicted
to be unsuitable does not mean such
areas will never support wolf breeding
pairs.
Strips and smaller (less than 2,600
km2 (1,000 mi2)) patches of theoretically
suitable habitat (Carroll et al. 2006, p.
34; Oakleaf et al. 2005, p. 559)
(typically, isolated mountain ranges)
often possess a higher mortality risk for
wolves because of their enclosure by,
and proximity to, unsuitable habitat
with a high mortality risk (Murray et al.
2010, p. 2514; Smith et al. 2010, p. 620).
In addition, pack territories often form
along distinct geological features (Mech
and Boitani 2003, p. 23), such as the
crest of a rugged mountain range, so
useable space for wolves in isolated
long narrow mountain ranges may be
reduced by half or more. This
phenomenon, in which the quality and
quantity of suitable habitat is
diminished because of interactions with
surrounding less-suitable habitat, is
known as an edge effect (Mills 1995, pp.
400–401). Edge effects are exacerbated
in small habitat patches with high
perimeter-to-area ratios (i.e., those that
are long and narrow, like isolated
mountain ranges) and in species with
large territories, like wolves, because
they are more likely to encounter
surrounding unsuitable habitat
(Woodroffe and Ginsberg 1998, p. 2128).
Because of edge effects, some habitat
areas outside the core areas may rank as
suitable in models, but are unlikely to
actually be successfully occupied by
wolf packs.
For the above reasons, we believe that
the Wyoming wolf population will be
centered around YNP and the GYA.
This was always the intention as
indicated by the GYA recovery area
identified in the 1987 Recovery Plan
and the primary analysis area identified
in the 1994 EIS. This core population
segment will continue to provide a
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constant source of dispersing wolves
into surrounding areas, supplementing
wolf packs and breeding pairs in
adjacent, but less secure suitable
habitat.
Currently Occupied Habitat—We
calculated the currently occupied area
in the NRM DPS wolf population by
drawing a line around the outer points
of radio-telemetry locations of all
known wolf pack territories at the end
of 2010 (Service et al. 2011, Figure 1).
Since 2002, most packs have occurred
within a consistent area (Service et al.
2003–2011, Figure 1), although the outer
boundary of the entire NRM wolf
population has fluctuated somewhat as
peripheral packs establish in unsuitable
or marginally suitable habitat and are
subsequently lost (Messer 2011, pers.
comm.). We define occupied wolf
habitat as that area confirmed as being
used by resident wolves to raise pups,
or that is consistently used by two or
more territorial wolves for longer than 1
month (Service 1994, pp. 6:5–6).
Typically by the end of a year, only 50
percent of packs meet the criteria to be
classified as breeding pairs.
The overall distribution of most
Wyoming wolf packs has been similar
since 2000, despite a wolf population in
the State that has more than doubled
(Service et al. 2001–2011, Figure 1;
Bangs et al. 2009, p. 104). This
distribution pattern of wolf packs only
forming in mountainous forest habitat
has persisted through 2010. The wolf
population has saturated most suitable
habitat in the State. Because packs are
unlikely to persist in unsuitable habitat,
significant growth in the population’s
distribution is unlikely. We include
unoccupied areas separating areas with
resident packs as occupied wolf habitat
because these intervening unsuitable
habitat areas are important for
demographic and genetic connectivity
(vonHoldt et al. 2010, p. 4412). While
these areas are no longer capable of
supporting persistent wolf packs,
dispersing wolves routinely travel
through these areas and packs
occasionally occupy them (Service
1994, pp. 6:5–6; Bangs 2002, p. 3;
Jimenez et al. 2011, p. 1).
Occupied habitat in Wyoming occurs
only in the northwestern part of the
State (see Figure 1 above). At the end of
2010, ‘‘occupied areas’’ (including both
pack occupied areas and unsuitable
areas between core recovery segments
used only for dispersal) were estimated
at approximately 46,600 km2 (18,000
mi2) in Wyoming (Service et al. 2005,
Figure 1). Specifically, this occupied
area extends slightly further east than
the WTGMA, includes about the
western-third of the Wind River Indian
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Reservation, and extends south to about
Big Piney, Wyoming. The occupied
portion of Wyoming and the GYA is
illustrated in Figure 1 above.
Since 2006, the Wyoming wolf
population has stabilized at
approximately 300 to 350 wolves
(Service et al. 2011, Table 4). We believe
this largely stable population level and
distribution is the result of the wolf
population approaching biological
limits, given available suitable habitat.
The remaining habitat predicted by
Carroll’s model is often fragmented,
occurring in smaller, more isolated
patches (Carroll et al. 2006, p. 35).
These areas have only been occupied by
a few breeding pairs that failed to
persist (Service et al. 2011, Figure 1).
Given the above, there is probably
limited ability for the Wyoming wolf
population to expand significantly
beyond its current outer boundaries,
even under continued protections of the
Act. As demonstrated by the wolf
population’s demographic stability and
relatively constant geographic
occupancy in northwestern Wyoming, it
is clear that there is sufficient suitable
habitat to maintain the Wyoming wolf
population well above recovery levels.
Potential Threats Affecting Habitat or
Range—Wolves are one of the most
adaptable large predators in the world
and are unlikely to be substantially
impacted by any threat except high
levels of human persecution (Fuller et
al. 2003, p. 163; Boitani 2003, pp. 328–
330). Even active wolf dens can be quite
resilient to nonlethal disturbance by
humans (Frame et al. 2007, p. 316).
Establishing a recovered wolf
population in the NRM region did not
require land-use restrictions or
curtailment of traditional land uses
because there was enough suitable
habitat, there were enough wild
ungulates, and there were sufficiently
few livestock conflicts to recover wolves
under existing conditions (Bangs et al.
2004, pp. 95–96). Traditional land-use
practices in Wyoming are not a threat to
wolves in the State, and thus, do not
need to be modified to maintain a
recovered wolf population into the
foreseeable future. We do not anticipate
that habitat changes in Wyoming will
occur at a magnitude that will threaten
wolf recovery in the foreseeable future,
because the vast majority of occupied
habitat is in public ownership that is
managed for uses that are
complementary with the maintenance of
suitable wolf habitat and viable wolf
populations (Carroll et al. 2003, p. 542;
Oakleaf et al. 2005, p. 560).
The 63,714 km2 (24,600 mi2) GYA is
primarily composed of public lands
(Service 1994, p. iv), and represents one
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of the largest contiguous blocks of
suitable habitat within the region.
Public lands in National Parks (YNP,
Grand Teton National Park, and John D.
Rockefeller, Jr. Memorial Parkway),
wilderness (the Absaroka Beartooth,
North Absaroka, Washakie, and Teton
Wilderness Areas), roadless areas, and
large blocks of contiguous mountainous
forested habitat, are largely unavailable
or unsuitable for intensive development.
Within the currently occupied portions
of Wyoming, land ownership is mostly
Federal (77 percent, 57 percent of which
is National Park Service or wilderness)
with some State (3 percent), Tribal (8
percent), and private lands (12 percent)
(Lickfett 2011, in litt.).
The vast majority of suitable wolf
habitat and the current wolf population
are secure in mountainous forested
Federal public land (National Parks,
wilderness, roadless areas, and some
lands managed for multiple uses by the
U.S. Forest Service and Bureau of Land
Management) that will not be legally
available or suitable for intensive levels
of human development (Service 1993,
1996, 2007; Servheen et al. 2003; U.S.
Forest Service 2006). Furthermore, the
ranges of wolves and grizzly bears
overlap in many parts of Wyoming and
the GYA, and mandatory habitat
guidelines for grizzly bear conservation
on public lands guarantee, and far
exceed, necessary criteria for
maintaining suitable habitat for wolves
(for an example, see U.S. Department of
Agriculture (USDA) 2006). Thus,
northwestern Wyoming will continue to
provide optimal suitable habitat for a
resident wolf population.
The availability of native ungulate
populations is a key factor in wolf
habitat and range. Wild ungulate prey
species are composed mainly of elk,
white-tailed deer, mule deer, moose,
and bison. Bighorn sheep, mountain
goats, and pronghorn antelope also are
common, but are not important as wolf
prey. In total, Wyoming supports about
50,000 elk and about 90,000 mule deer
in northwestern Wyoming (Bruscino
2011, in litt.). All of Wyoming’s 35 elk
management units are at or above the
WGFD numeric objectives for those
herds; however, calf/cow ratios in
several herd units are below desired
levels (WGFD 2010, p. 1). The State of
Wyoming has successfully managed
resident ungulate populations for
decades. With managers and scientists
collaborating to determine the source of
the potential population fluctuations
and appropriate management responses,
we feel confident that, although
different herds may experience differing
population dynamics, the GYA will
continue to support large populations of
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ungulates, and Wyoming will continue
to maintain ungulate populations at
densities that will continue to support
a recovered wolf population well into
the foreseeable future.
The presence of cattle and sheep also
impact wolf habitat and range. Cattle
and sheep are at least twice as
numerous as wild ungulates, even on
public lands (Service 1994, p. viii). Most
wolf packs have at least some
interaction with livestock. Wolves and
livestock can live near one another for
extended periods of time without
significant conflict, if agency control
prevents the behavior of chronic
livestock depredation from becoming
widespread in the wolf population.
Through active management, most
wolves learn that livestock cannot be
successfully attacked and do not view
them as prey. However, whenever
wolves and livestock mix, some
livestock and some wolves will be
killed. Conflicts between wolves and
livestock have resulted in the annual
removal of 8 to 15 percent of the wolf
population (Bangs et al. 1995, p. 130;
Bangs et al. 2004, p. 92; Bangs et al.
2005, pp. 342–344; Service et al. 2011,
Tables 4, 5; Smith et al. 2010, p. 620).
Such active control promotes occupancy
of suitable habitat in a manner that
minimizes damage to private property,
and fosters public support to maintain
recovered wolf populations without
threatening the wolf population
viability.
We do not foresee a substantial
increase in livestock abundance
occurring across northwestern Wyoming
that would result in increased wolf
mortality, and in fact, the opposite trend
has been occurring. In recent years,
more than 200,000 hectares (500,000
acres) of public land grazing allotments
have been purchased and retired in
areas of chronic conflict between
livestock and large predators, including
wolves (Fischer 2008, in litt.). Assuming
adequate regulation of other potential
threat factors (discussed below), we do
not believe the continued presence of
livestock will in any meaningful way
threaten the recovered status of the
Wyoming wolf population in the
foreseeable future.
Although human population growth
and development may impact wolf
habitat and range, we expect these
impacts will be minimal, as the amount
of secure suitable habitat is more than
sufficient to support wolf breeding pairs
well above recovery levels. We expect
the region will see: Increased growth
and development including conversion
of private low-density rural lands to
higher density urban and suburban
development; accelerated road
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development and increasing amounts of
transportation facilities (pipelines and
energy transmission lines); additional
resource extraction (primarily oil and
gas, coal, and wind development in
certain areas); and increased recreation
on public lands (Robbins 2007, entire).
Despite efforts to minimize impacts to
wildlife (Brown 2006, pp. 1–3), some
development will make some areas of
Wyoming and the GYA less suitable for
wolf occupancy. In the six northwestern
Wyoming counties most used by
wolves, the human population is
projected to increase approximately 15
percent by 2030 (from 122,787 counted
in 2010 to 141,000 forecast in 2030)
(Carroll et al. 2006, p. 536; Wyoming
Department of Administration and
Information Economic Analysis
Division 2008, entire; U.S. Census
Bureau 2010, entire). We anticipate
similar levels of population growth in
the other neighboring areas, because the
West as a region is projected to increase
at rates faster than any other region
(U.S. Census Bureau Population
Division 2005). As human populations
increase, associated impacts will follow.
However, human development will not
occur on a scale that could possibly
affect the overall suitability of Wyoming
or the GYA for wolves, and no
foreseeable habitat-related threats will
prevent these areas from supporting a
wolf population that is capable of
substantially exceeding recovery levels.
Most types of intensive human
development predicted in the future in
Wyoming will occur in areas that have
already been extensively modified by
human activities and are unsuitable as
wolf habitat (Wyoming 2005, Appendix
III). Mineral extraction activities are
likely to continue to be focused at lower
elevations, on private lands, in open
habitats, and outside of currently
suitable and currently occupied wolf
habitat (Robbins 2007, entire).
Development on private land near
suitable habitats will continue to expose
wolves to more conflicts and higher risk
of human-caused mortality. However,
the rate of conflict is well below the
level wolves can withstand, especially
given the large amount of secure habitat
in public ownership, much of which is
protected, that will support a recovered
wolf population and will provide a
reliable and constant source of
dispersing wolves. Furthermore,
management programs (Linnell et al.
2001, p. 348), research and monitoring,
and outreach and education about living
with wildlife can somewhat reduce such
impacts.
Modeling exercises can also provide
insight into future land-use
development patterns. While these
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models have weaknesses (such as an
inability to accurately predict economic
upturns or downturns, uncertainty
regarding investments in infrastructure
that might drive development such as
roads, airports, or water projects, and an
inability to predict open-space
acquisitions or conservation easements),
we nevertheless think that such models
are useful in adding to our
understanding of likely development
patterns. Carroll et al. (2003, p. 541;
2006, p. 32) predicted future wolf
habitat suitability under several
scenarios through 2025, including
potential threats such as increased
human population growth and road
development. Similarly, in 2005, the
Center for the West produced a series of
maps predicting growth through 2040
for the West (Travis et al. 2005, pp. 2–
7). These projections are available at:
https://www.centerwest.org/futures/west/
2040.html. These models predict very
little development across occupied and
suitable portions of the NRM DPS,
Wyoming, or GYA.
Based on these projections, we have
determined that increased development
will not alter wolf habitat suitability in
the NRM DPS, Wyoming, or GYA nearly
enough to cause the wolf population to
fall below recovery levels in the
foreseeable future. We acknowledge that
habitat suitability for wolves will
change over time with human
development, activities, and attitudes,
but not to the extent that it is likely to
threaten wolf recovery. We do not
believe future human population growth
will adversely affect wolf conservation.
Wolf populations persist in many areas
of the world that are far more developed
than this region currently is, or is likely
to be, in the foreseeable future (Boitani
2003, pp. 322–323). Current habitat
conditions are adequate to support a
wolf population well above minimal
recovery levels and model predictions
indicate that development over the next
25 years is unlikely to change habitat in
a manner that would threaten the wolf
population (Carroll et al. 2003, p. 544).
Regarding connectivity between the
Wyoming and the GYA wolf to the
remainder of the NRM DPS, minimal
change in human population growth
(Travis et al. 2005, pp. 2–7) and habitat
suitability (Carroll et al. 2003, p. 541;
Carroll et al. 2006, p. 32) are expected
along the Idaho-Montana border
between the central Idaho wolf
population and the GYA. In fact,
projected development is anticipated to
include modest expansions
concentrated in urban areas and
immediately surrounding areas (Travis
et al. 2005, pp. 2–7). Conversely, in
many surrounding rural areas, habitat
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suitability for wolves will be increased
beyond current levels as road densities
on public lands are reduced, a process
under way in the entire NRM region
(Carroll et al. 2006, p. 25; Servheen et
al. 2003; Service 1993, 1996, 2007;
Brown 2006, pp. 1–3). Wolves have
exceptional dispersal abilities including
the ability to disperse long distances
across vast areas of unsuitable habitat.
Numerous lone wolves have already
been documented to have successfully
dispersed through these types of
developed areas (Jimenez et al. 2011, p.
1). History proves that wolves are
among the least likely species of land
mammal to face a serious threat from
reduced connectivity related to
projected changes in habitat (Fuller et
al. 2003, pp. 189–190).
There is more than enough habitat
connectivity between occupied wolf
habitat in Canada, northwestern
Montana, and Idaho to ensure exchange
of sufficient numbers of dispersing
wolves to maintain demographic and
genetic diversity in the NRM wolf
metapopulation. We have documented
routine movement of radio-collared
wolves across the nearly contiguous
available suitable habitat between
Canada, northwestern Montana, and
central Idaho. No foreseeable threats put
this connectivity at risk. The GYA is the
most physically isolated core recovery
area within the NRM DPS, but the GYA
has also demonstrated sufficient levels
of connectivity to other occupied
habitats and wolf populations in the
NRM. Within the foreseeable future,
only minimal habitat degradation will
occur between the GYA and the other
recovery areas, as a result of delisting
and management of wolves in
Wyoming. Overall, we believe this will
have only minimal impacts on
foreseeable levels of dispersal and
connectivity of wolves in the GYA and
the State of Wyoming with other wolf
populations in the NRM. In short, future
connectivity is unlikely to be
meaningfully impacted by changes in
habitat and range (genetic exchange is
discussed in more detail under Factor E
below), to an extent that would threaten
the recovered status of the Wyoming
wolf population in the foreseeable
future.
Factor B. Overutilization for
Commercial, Recreational, Scientific, or
Educational Purposes
Commercial or Recreational Uses—
This section discusses both legal and
illegal killing for commercial or
recreational purposes such as hunting
and trapping. All other potential sources
of human-caused mortality (e.g., legal or
illegal killing for other purposes, agency
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or individual actions to address
conflicts over wolf-livestock
interactions, or wolf kills in the predator
area of Wyoming) are discussed in the
‘‘Human-caused predation’’ section of
Factor C below. First, this section
discusses illegal commercial or
recreational use. Next, this section
focuses on legal hunting and trapping in
Wyoming. Finally, this section evaluates
regulated hunting and trapping in Idaho
and Montana because some wolves and
some packs cross State boundaries.
Since the species was listed, killing
for commercial or recreational use has
been prohibited. While some wolves
may have been illegally killed for
commercial use of the pelts and other
parts, we believe such illegal
commercial trafficking is rare.
Furthermore, illegal capture of wolves
for commercial breeding purposes is
also possible, but we have no evidence
that it occurs in Wyoming, the GYA, or
elsewhere in the NRM DPS. We believe
the prohibition against ‘‘take’’ provided
by Section 9 of the Act has discouraged
and minimized the illegal killing of
wolves for commercial or recreational
purposes. Post-delisting, we believe the
State, tribal, and other Federal laws and
regulations will continue to provide a
strong deterrent to such illegal wolf
killing by the public. State, tribal, and
other Federal wildlife agencies have
well-distributed experienced
professional law enforcement officers to
help enforce their respective wildlife
regulations. Similar regulatory
approaches have been effective in the
conservation of other resident wildlife
such as black bears, mountain lions, elk,
and deer. Most hunting and trapping
that will occur post-delisting, will be
legal, permitted, and regulated by the
State of Wyoming or the Wind River
Indian Reservation.
Legal regulated harvest will be
employed by all States within the GYA
where the wolf is delisted. Additionally,
the Wind River Indian Reservation may
consider legal regulated harvest. Wolf
conservation can be compatible with
harvest. Wolves can maintain
population levels despite very high
sustained human-caused mortality rates
of 22 to greater than 50 percent (Keith
1983; Ballard et al. 1987; Fuller 1989;
Fuller et al. 2003, pp. 182–184; Creel
and Rotella 2010). Mortality rates and
population growth rates reported from
2007 to 2010 indicate that the wolf
population in Wyoming outside YNP
can sustain, on average, a 36 percent
mortality rate from human causes
(WGFC 2011, p. 12). When populations
are maintained below carrying capacity
and natural mortality rates remain low,
human-caused mortality can replace up
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to 70 percent of natural mortality (Fuller
et al. 2003, p. 186). Wolf pups can also
be successfully raised by other pack
members (Boyd and Jimenez 1994) and
breeding individuals can be quickly
replaced by other wolves (Brainerd et al.
2008, p. 89), which further mitigates the
impact of harvest.
Regulated hunting and trapping are
commonly used to manage wolves in
Canada and Alaska without negative
population-level effects (Bangs 2008).
Furthermore, all States in the NRM DPS
have substantial experience operating
regulated harvest as a wildlife
management tool for resident species. In
2009, Montana and Idaho conducted a
wolf hunt where 257 wolves were
killed. Even with this harvest, the
population grew in 2009 by almost 5
percent across the NRM, including
modest increases in all three States.
Collectively, these factors give us every
confidence that the States will run
hunts such that wolf populations will
not be threatened by recreational or
commercial uses.
In Wyoming, wolves will be
permanently managed as game animals
or protected (e.g., in National Parks) in
about 40,000 km2 (15,400 mi2) in the
northwestern portion of the State (15.7
percent of Wyoming), including YNP,
Grand Teton National Park, John D.
Rockefeller Memorial Parkway, adjacent
U.S. Forest Service-designated
Wilderness Areas, adjacent public and
private lands, the National Elk Refuge,
and the Wind River Indian Reservation
(Lickfett 2011, in litt.). This area is of
sufficient size to support Wyoming wolf
population targets, under the
management regime proposed for this
area.
Wolves will be managed as trophy
game animals within the area of
northwestern Wyoming identified as the
WTGMA (see Figure 1 above). ‘‘Trophy
game’’ status allows the WGFC and
WGFD to regulate methods of take,
hunting seasons, and numbers of wolves
that could be killed. The boundary and
size of the WTGMA will be established
by State statute and cannot be
diminished through WGFC rule or
regulation. The WTGMA will be
seasonally expanded approximately 80
km (50 mi) south (see Figure 1 above)
from October 15 to the last day of
February (28th or 29th) to facilitate
natural dispersal of wolves between
Wyoming and Idaho. During this
timeframe, the trophy game area will be
expanded by approximately 3,300 km2
(1,300 mi2) (i.e., an additional 1.3
percent of Wyoming) (Lickfett 2011, in
litt.).
Within the WTGMA, Wyoming
intends to use public harvest of wolves
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to reduce wolf populations to minimize
conflicts with livestock, ungulate herds,
and humans (WGFC 2011, pp. 1, 23).
The WGFD will develop an annual hunt
plan that will take into consideration,
but not be limited to, the following
when developing a wolf hunting
program or extending wolf hunting
seasons: wolf breeding seasons; shortand long-range dispersal opportunity,
survival, and success in forming new or
joining existing packs; conflicts with
livestock; and the broader game
management responsibilities related to
ungulates and other wildlife (WGFC
2011, pp. 2–3, 16, 25, 53). Harvest
quotas will be established through
WGFD’s normal season-setting process.
Quotas will be based on the population
status of wolves at the end of the
previous calendar year, and consider
estimated wolf mortality and population
growth believed to have occurred during
the current calendar year (WGFC 2011,
pp. 23–25). All forms of wolf mortality
will be considered when setting
appropriate harvest levels (WGFC 2011,
pp. 23–25). Seasons will close when the
mortality quota is reached or if the
WGFC deems it necessary to close the
season for other reasons. Importantly,
the WGFD will not manage wolves at
the minimum population objective
(WGFC 2011, p. 24). Instead, the WGFD
will set harvest levels that maintain an
adequate buffer above minimum
population objectives to provide
management flexibility (WGFC 2011,
p. 24).
Wyoming wolf hunting seasons will
primarily coincide with fall big game
hunting seasons, but may be extended if
quotas are not met (WGFC 2011, pp. 23–
25, 53). That said, most hunting-related
mortality will occur in October and
November when human access is
greatest and more big game hunters are
active (MFWP 2009, p. 3, 5; WGFC
2011, p. 24). Wyoming’s wolf
management plan indicates that the
State expects to delineate approximately
10 to 12 wolf hunting areas within the
WTGMA to focus harvest in specific
areas (i.e., areas with high wolf–
livestock conflict, high human trafficked
areas, or areas where ungulate herds are
below State management objectives)
(WGFC 2011, pp. 1, 16). Persons who
legally harvest a wolf within the
WTGMA will be required to report the
harvest to the WGFD within 24 hours,
and check the harvested animal in
within 5 days (WGFC 2011, pp. 3, 22–
25). Reporting periods for harvested
wolves may be extended after inaugural
hunting seasons if it is determined that
extended reporting periods will not
increase the likelihood of overharvest
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(WGFC 2011, p. 23). Similar harvest
strategies have been successful for
countless other wildlife species in
Wyoming.
Commercial or recreational trapping
is not currently being planned in
Wyoming (Mills 2011, in litt.). However,
an adaptive management approach,
which could include trapping, may
occur in the future if hunting is
determined to be inadequate to achieve
wolf harvest objectives (WGFC 2011, p.
25). We expect trapping will likely be
limited as Wyoming’s geography
suggests other sources of mortality will
make the State’s wolf population
management objectives easily
achievable. If trapping is used in the
future it will be conducted within the
framework of the State’s overall
demographic targets.
In our 2009 delisting rule (74 FR
15123, April 2, 2009), we determined
that Wyoming’s proposed 2008 harvest
strategy (that was never implemented)
was well-designed, biologically sound,
and, by itself, it would not have
threatened Wyoming’s share of the
recovered NRM wolf population. Given
Wyoming’s strong commitment to
maintain the population at or above
agreed-upon population targets, their
intention to consider all forms of wolf
mortality when making wolf control
management decisions, and numerous
safeguards built into their harvest
strategy, we are confident that this
source of mortality will never
compromise the Wyoming wolf
population’s recovered status.
The Wind River Indian Reservation’s
management plan indicates wolves will
be designated as a game animal postdelisting and hunting and trapping can
occur (Shoshone and Arapaho Tribal
Fish and Game Department 2007, p. 9).
The season timing and length, harvest
quota, and other specifics will be
determined by the Eastern Shoshone
and Northern Arapaho Tribes (Shoshone
and Arapaho Tribal Fish and Game
Department 2007, p. 9). Harvest strategy
will depend on the number of wolves
present on Wind River Indian
Reservation and the management
direction the Tribes wish to take
(Shoshone and Arapaho Tribal Fish and
Game Department 2007, p. 9). The
Tribes have not designated a specific
number of individuals or packs for
which they will manage (Shoshone and
Arapaho Tribal Fish and Game
Department 2007, p. 9). Given the small
number of wolves, packs, and breeding
pairs supported while Act protections
were in place, we expect the area will
support very modest wolf population
levels and distribution. Given this, we
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expect very limited hunting or trapping
on the Wind River Indian Reservation.
No legal hunting or trapping will
occur in YNP, Grand Teton National
Park, or the National Elk Refuge. In
YNP, hunting pressures in adjoining
areas are unlikely to impact park wolves
as YNP wolves rarely leave the park
during the time period when hunting
would occur. The wolf population in
YNP has ranged from 96 to 171 wolves
since 2000. However, the YNP wolf
population appears to be declining
toward a long-term equilibrium at or
slightly below the lower end of this
range (Service et al. 2000–2010, Table b;
Smith 2010, pers. comm.). In Grand
Teton National Park and the National
Elk Refuge, wolf pack home ranges
typically cross outside of these Federal
boundaries, thus, hunting pressures in
adjoining areas would likely impact
these wolves.
Hunting in Idaho and Montana may
impact Wyoming wolves because some
wolves and some packs cross State
boundaries. Both Idaho and Montana
designated wolves as game animals
Statewide and each State conducted
conservative wolf hunts in 2009. In
total, Montana hunts took 72 wolves out
of the 75 harvest quota and, in Idaho,
hunts took 185 wolves out of a quota of
220. Each State closed wolf harvest in
individual management zones as their
individual quota was achieved.
Montana closed its wolf hunt statewide
November 16th. In Idaho, a few zones
remained open until March 31. Despite
a total harvest of 257 wolves in Montana
and Idaho, the NRM population still
grew in 2009 by almost 5 percent
including modest increases in all three
States. These hunts distributed wolf
harvest across occupied habitat, took
into account connectivity and possible
dispersal corridors, resulted in good
hunter compliance, and improved
hunter attitudes about wolves (MFWP
2010, pp. 17–25; IDFG 2010, pp. 13–14;
Dickson 2010). As anticipated in our
2009 delisting rule (74 FR 15123, April
2, 2009), Montana and Idaho are now
planning more aggressive hunts for fall
2011 to reduce the population below
current levels (which are likely at or
above long-term carrying capacity of the
suitable habitat).
Within the GYA, Idaho’s 2011 season
has a quota of 30 wolves in the Island
Park hunting unit (referred to as the
Upper Snake Management Zone in the
2010 annual report) (Idaho Fish and
Game Commission (IFGC) 2011). Island
Park’s season will run from August 30th
to December 31st and one wolf can be
taken per tag with a limit of two tags per
person (IFGC 2011). At the end of 2010,
the Island Park unit was occupied by
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seven packs including five that were
counted towards Idaho’s totals and two
counted towards Wyoming’s population
totals (Service et al. 2011, pp. 81–84 in
the Idaho chapter). Four of these five
packs were confirmed to qualify as
breeding pairs (the reproductive status
for other pack was not known) (Service
et al. 2011, pp. 81–84 in the Idaho
chapter). Two of the Idaho packs and
both of the Wyoming packs had home
ranges that spanned the Idaho-Wyoming
stateline (Service et al. 2011, pp. 81–84
in the Idaho chapter). To help
understand the potential impacts of
Idaho’s hunt on these wolves, it is
instructive to look at the 2009 hunting
season. There is no harvest data from
2010 because wolves were not hunted in
2010. During the 2009 season, this zone
had a quota of five wolves with an
October 1st to December 31st season
and a limit of one wolf per person
(Service et al. 2011, pp. 81–84 in the
Idaho chapter). The quota for this unit
was met and the unit was closed
November 2nd (Service et al. 2011, pp.
81–84 in the Idaho chapter). Between
the end of 2008 and the end of 2009 (the
period impacted by the 2009 wolf hunt),
the number of packs in this area
increased from two to four and the
number of breeding pairs in this unit
remained steady at two (Service et al.
2008, pp. 76–80 in the Idaho chapter;
Service et al. 2009, pp. 52–56 in the
Idaho chapter).
Thus, this modest hunting level had
minimal impact. While it is unclear if
the 2011 quota for this unit will be
achieved, it is likely this hunting season
will reduce the number of wolves,
packs, and breeding pairs in this area
(this is the State’s intention). In the long
run, we believe it is likely this area will
continue to support a modest number of
wolves and packs (one to four packs)
some of which will qualify as breeding
pairs. This regulated taking in Idaho
may minimally impact a small number
of Wyoming wolves (e.g., the two packs
that are counted in Wyoming’s totals
that also cross into Idaho). In future
years, once the initial desired
population level is achieved, such
impacts are expected to be minimal.
Idaho’s other hunting unit in the GYA
area is the southern Idaho unit.
Potential hunting impacts in this unit
are expected to be zero to low single
digits based on past take (one wolf in
2009) and the area’s limited wolf
population (no confirmed resident
wolves, packs or breeding pairs)
(Service et al. 2011, pp. 71–74 in the
Idaho chapter).
Trapping was not authorized in either
the Island Park unit or the southern
Idaho unit (IFGC 2011). Trapping was
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only authorized where hunting alone
was not anticipated to be effective in
reducing the wolf population (IFGC
2011). Because trapping is typically
reserved for more remote, inaccessible
areas (IFGC 2011), we do not expect
much if any future trapping in this area.
Montana’s wolf quota for 2011 within
the GYA is 43 wolves including 19
wolves within the Gallatin/Madison
unit, 6 wolves within the Highlands/
Tobacco Roots/Gravelly/Snowcrest unit,
and 18 wolves within the South Central
Montana unit (MFWP 2011, pp. 6–7).
The South Central Montana unit also
includes a subquota of 3 wolves in areas
immediately adjacent to YNP in order to
limit impacts to park wolves. At the end
of 2010, Montana’s portion of the GYA
contained a minimum of 118 wolves in
19 verified packs, 6 of which qualified
as breeding pairs (Service et al. 2011,
pp. 72–82 in the Montana chapter). Two
additional packs are counted in
Wyoming’s population, but may spend
some time in Montana (Service et al.
2011, pp. 72–82 in the Montana
chapter). Again, a review of the 2009
hunting season may assist in
understanding potential impacts of
Montana’s hunt to wolves in Wyoming
and the GYA. In 2009, the MFWP
Commission developed a single unit for
all of southwest Montana and
authorized a quota of 12 wolves (Service
et al. 20009, pp. 18–25 in the Montana
chapter). Wolf take in this unit occurred
very rapidly, and was concentrated just
north of YNP (Service et al. 2009, pp.
18–25 in the Montana chapter). As a
result, the backcountry portions of the
unit were temporarily closed on October
9th, and permanently closed on October
13th, after 9 wolves were taken (Service
et al. 20009, pp. 18–25 in the Montana
chapter). Four additional wolves were
taken in the remainder of the unit. From
the end of 2008 to the end of 2009 (the
period impacted by the 2009 wolf hunt),
the minimum wolf population estimate
in Montana’s share of the GYA declined
from 130 wolves in 18 packs, 11 of
which met the breeding pair criteria, to
106 wolves in 17 verified packs, 9 of
which qualified as a breeding pair. Both
agency control (which increased in
2009) and hunter harvest were factors in
these declines.
While it is unclear if Montana’s 2011
quotas for this area will be achieved, it
is Montana’s intention that this hunting
season will modestly reduce the number
of wolves, packs, and breeding pairs in
this area. In the long run, it is likely this
area will continue to support a sizeable
number of wolves, packs, and breeding
pairs. Specifically, in our professional
judgment, we believe this area will
support at least 8 packs long term, a
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significant number of which will qualify
as breeding pairs. This regulated taking
in Montana, in light of the subquotas for
areas adjacent to YNP, may impact some
Wyoming wolves in some years, but is
not expected to be a significant impact.
In summary, illegal commercial and
recreational use will remain a negligible
source of mortality and legal, Stateregulated harvest for commercial and
recreational use will be managed in a
manner compatible with wolf
conservation. Wolves can maintain
population levels despite very high
sustained human-caused mortality rates.
In 2009, Montana and Idaho conducted
a wolf hunt where 257 wolves were
harvested, and the population still grew
by almost 5 percent. Regulated hunting
and trapping are commonly used to
manage wolves in Canada and Alaska
without population-level negative
effects (Bangs 2008), and all States in
the NRM DPS have substantial
experience operating regulated harvest
as a wildlife management tool for
resident species. In Wyoming,
population levels will be carefully
monitored; all sources of mortality will
be used to set quotas and measure
progress toward them; hunting units
will be closed when quotas are met, or
if otherwise needed (e.g., if overall
population objectives are being
approached); hunting units will be
small to allow targeted control of
authorized mortality; and populations
will be managed with a buffer above
minimum targets. This approach is
consistent with the State’s management
of numerous other species. Trapping
will be rare everywhere in the GYA.
On the whole, we anticipate Wyoming
(like Idaho and Montana) will gradually
reduce populations in the short term
with moderately aggressive harvest
rates, and that these harvest rates will be
reduced over time. Long term, total
human-caused mortality (from all
sources) in portions of Wyoming under
State jurisdiction may average around
36 percent as the State uses regulated
harvest to maintain the wolf population
in areas under Wyoming’s jurisdiction
modestly above their minimum
population target of at least 100 wolves
and at least 10 breeding pairs. Regulated
harvest in portions of the GYA outside
of Wyoming’s jurisdiction is expected to
have only minimal impacts on
Wyoming’s wolf population.
Overutilization for Scientific or
Educational Purposes—From 1979 to
2010, the Service and our cooperating
partners captured 1,963 wolves for
monitoring, nonlethal control, and
research purposes with less than 3
percent experiencing accidental death.
If Wyoming wolves are delisted, the
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State, National Parks, and/or Tribes will
continue to capture and radio-collar
wolves for monitoring and research
purposes in accordance with State,
Federal, and tribal laws, wolf
management plans, regulations, and
appropriate agency humane animal care
and handling policies. The capture or
possession of wolves from within the
WTGMA for scientific or educational
purposes will be regulated by the WGFC
under rules set in Chapter 10 and
Chapter 33 of Commission Regulations.
We expect that capture-caused mortality
by Federal, State, and Tribal agencies,
and universities conducting wolf
monitoring, nonlethal control, and
research will remain below 3 percent of
the wolves captured, and will remain an
insignificant source of mortality to the
wolf population (Murray et al. 2010, p.
2519).
We are unaware of any wolves that
have been removed from the wild for
solely educational purposes in recent
years. Wolves that are used for such
purposes are typically privately held
captive-reared offspring of wolves that
were already in captivity for other
reasons and are not protected by the
Act. However, we or the States and
Tribes may get requests to place wolves
that would otherwise be euthanized in
captivity for research or educational
purposes. Such requests have been, and
are likely to continue to be, rare. Such
requests will not substantially impact
human-caused wolf mortality rates.
Factor C. Disease or Predation
This section discusses disease and
parasites, natural predation, and
human-caused predation. The humancaused mortality section discusses all
sources of human-caused mortality not
discussed under Factor B’s commercial
and recreational uses section above. The
below analysis focuses on wolves in
Wyoming, but considers adjoining
portions of the GYA as some wolves and
some packs cross State boundaries. Data
for other regions is considered where it
implies a threat that could someday
impact Wyoming or GYA wolves.
Disease—Wolves throughout North
America are exposed to a wide variety
of diseases and parasites. Many diseases
(viruses and bacteria, many protozoa
and fungi) and parasites (helminthes
and arthropods) have been reported for
the gray wolf, and several of them have
had significant, but temporary impacts
during wolf recovery in the 48
conterminous States (Brand et al. 1995,
p. 428; Kreeger 2003, pp. 202–214). The
EIS on gray wolf reintroduction
identified disease impact as an issue,
but did not evaluate it further (Service
1994, pp. 1:20–21).
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Infectious disease induced by
parasitic organisms is a normal feature
in the life of wild animals, and the
typical wild animal hosts a broad multispecies community of potentially
harmful parasitic organisms (Wobeser
2002, p. 160). We fully anticipate that
these diseases and parasites will follow
the same pattern seen for wolves in
other areas of North America (Brand et
al. 1995, pp. 428–429; Bailey et al. 1995,
p. 445; Kreeger 2003, pp. 202–204;
Atkinson 2006, pp. 1–7; Smith and
Almberg 2007, pp. 17–19; Johnson
1995a, 1995b; Almberg et al. 2009, p. 3;
2010, p. 2058; Jimenez et al. 2010a, p.
1120; 2010b p. 331), and will not
significantly threaten wolf population
viability. Nevertheless, because these
diseases and parasites, and perhaps
others, have the potential to impact wolf
population distribution and
demographics, monitoring implemented
by the States, Tribes, and National Park
Service will track disease and parasite
events. Should such an outbreak occur
that results in a population decline,
discretionary human-caused mortality
(such as hunting, post-delisting) would
be adjusted over an appropriate area and
time period to ensure wolf population
numbers are maintained above recovery
levels (WGFC 2011, pp. 21–22, 24).
Canine parvovirus (CPV) infects
wolves, domestic dogs (Canis
familiaris), foxes (Vulpes vulpes),
coyotes (Canis latrans), skunks
(Mephitis mephitis), and raccoons
(Procyon lotor). The population impacts
of CPV occur via diarrhea-induced
dehydration leading to abnormally high
pup mortality (Wisconsin Department of
Natural Resources 1999, p. 61). Clinical
CPV is characterized by severe
hemorrhagic diarrhea and vomiting;
debility and subsequent mortality is a
result of dehydration, electrolyte
imbalances, and shock. CPV has been
detected in nearly every wolf
population in North America including
Alaska (Bailey et al. 1995, p. 441; Brand
et al. 1995, p. 421; Kreeger 2003, pp.
210–211; Johnson et al. 1994; Almberg
et al. 2009, p. 2), and exposure in
wolves is thought to be almost
universal. Currently, nearly 100 percent
of the wolves handled by MFWP
(Atkinson 2006) and YNP (Smith and
Almberg 2007, p. 18; Almberg et al.
2009, p. 2) had blood antibodies
indicating nonlethal exposure to CPV.
CPV might have contributed to low pup
survival in the northern range of YNP in
1999. CPV was suspected to have done
so again in 2005 and possibly 2008, but
evidence points to canine distemper
(CD) as being the primary cause of low
pup survival during those years (Smith
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et al. 2006, p. 244; Smith 2008; Almberg
et al. 2010, p. 2058). Pup production
and survival in YNP returned to normal
levels after each event (Almberg et al.
2009, pp. 18–19). The impact of disease
outbreaks to the overall NRM wolf
population has been localized and
temporary, as has been documented
elsewhere (Bailey et al. 1995, p. 441;
Brand et al. 1995, p. 421; Kreeger 2003,
pp. 210–211). Despite these periodic
disease outbreaks, the NRM wolf
population increased at a rate of about
20 percent annually from 1996 to 2010
(Service et al. 2011, Table 4). Mech et
al. (2008, p. 824) recently concluded
CPV reduced pup survival, subsequent
dispersal, and the overall rate of
population growth in Minnesota (a
population near carrying capacity in
suitable habitat). It is possible that at
carrying capacity CPV may affect the
GYA and Wyoming wolf populations
similarly, such that the overall rate of
growth may be reduced.
Canine distemper (CD) is an acute,
fever-causing disease of carnivores
caused by a virus (Kreeger 2003, p. 209).
It is common in domestic dogs and
some wild canids, such as coyotes and
foxes in the NRM region (Kreeger 2003,
p. 209). The prevalence of antibodies to
this disease in wolf blood in North
American wolves is about 17 percent
(Kreeger 2003, p. 209), but varies
annually and by specific location.
Nearly 85 percent of Montana wolf
blood samples analyzed in 2005
indicated nonlethal exposure to CD
(Atkinson 2006). Similar results were
found in YNP (Smith and Almberg
2007, p. 18; Almberg et al. 2010, p.
2061). Mortality in wolves has been
documented in Canada (Carbyn 1982, p.
109), Alaska (Peterson et al. 1984, p. 31;
Bailey et al. 1995, p. 441), and in a
single Wisconsin pup (Wydeven and
Wiedenhoeft 2003, p. 7). CD is not a
major mortality factor in wolves,
because despite high exposure to the
virus, affected wolf populations usually
demonstrate good recruitment (Brand et
al. 1995, pp. 420–421). Mortality from
CD has only been confirmed on a few
occasions in NRM wolves despite their
high exposure to it, however, we
suspect it contributed to the high pup
mortality documented in the northern
GYA in spring 1999, 2005, and 2008
(Almberg et al. 2010, p. 2061).
CD is likely maintained in the NRM
region by multiple hosts and periodic
outbreaks will undoubtedly occur every
2–5 years (Almberg et al. 2010, p. 2058).
However, as documented elsewhere, CD
does not threaten wolf populations, and
the NRM wolf population increased
even during years with localized
outbreaks (Almberg et al. 2010, p. 2058).
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YNP biologists (Smith 2008, pers.
comm.) believe that wolf deaths mainly
occurred from CD when the YNP
population was around the historic high
of 170 wolves the previous winter. In
2008, wolf packs in Wyoming outside
YNP (about 25 packs and 15 breeding
pairs) appeared to have normal pup
production (Jimenez 2008, pers. comm.),
indicating the probable disease outbreak
in 2008 was localized to YNP. This
suggests CD mortality may be associated
with high wolf density, and possibly
carrying capacity. Thus, the wolf
populations in the GYA may be more
affected by CD and other diseases when
wolves exist at high densities in suitable
habitat (i.e., in YNP).
Lyme disease, caused by a spirochete
bacterium, is spread primarily by deer
ticks (Ixodes dammini). Host species
include humans, horses (Equus
caballus), dogs, white-tailed deer, mule
deer, elk, white-footed mice
(Peromyscus leucopus), eastern
chipmunks (Tamias striatus), coyotes,
and wolves. In wolf populations in the
Western Great Lakes region, it does not
appear to cause adult mortality, but
might be suppressing population growth
by decreasing wolf pup survival
(Wisconsin Department of Natural
Resources 1999, p. 61). Lyme disease
has not been documented in the GYA or
Wyoming wolf populations.
Mange is caused by a mite (Sarcoptes
scabeii) that infests the skin. The
irritation caused by feeding and
burrowing mites results in intense
itching, resulting in scratching and
severe fur loss, which can lead to
secondary infections or to mortality
from exposure during severe winter
weather (Kreeger 2003, pp. 207–208).
Advanced mange can involve the entire
body and can cause emaciation,
decreased flight distance, staggering,
and death (Kreeger 2003, p. 207). In a
long-term Alberta wolf study, higher
wolf densities were correlated with
increased incidence of mange, and pup
survival decreased as the incidence of
mange increased (Brand et al. 1995, pp.
427–428). Mange has been shown to
temporarily affect wolf population
growth rates and perhaps wolf
distribution (Kreeger 2003, p. 208).
Mange has been detected in, and
caused mortality to, GYA wolves
(Jimenez et al. 2010a, p. 1120; Atkinson
2006, p. 5; Smith and Almberg 2007, p.
19). The GYA wolves likely contracted
mange from coyotes or fox, whose
populations experience occasional
outbreaks. Between 2003 and 2008, the
percentage of Montana packs with
mange fluctuated between 3 and 24
percent of packs. Between 2002 and
2008, the percentage of Wyoming packs
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with mange fluctuated between 3 and 15
percent of packs. In these cases, mange
did not appear to infest every member
of the pack. For example, in 2008,
manage was detected in 8 wolves from
4 different packs in YNP, one pack in
Wyoming outside YNP, and a couple of
packs in previously infested areas of
southwestern Montana. Mange has
never been confirmed in wolves in
Idaho (Jimenez et al. 2010a, p. 1123).
In packs with the most severe mange
infestations, pup survival appeared low,
and some adults died (Jimenez et al.
2010a, pp. 1122–1123). In addition, we
euthanized several wolves with severe
mange for humane reasons and because
of their abnormal behavior. We predict
that mange in the GYA and State of
Wyoming will act as it has in other parts
of North America (Brand et al. 1995, pp.
427–428; Kreeger 2003, pp. 207–208;
Jimenez et al. 2010, p. 1123) and not
threaten wolf population viability.
Wolves are not likely to be infested with
mange on a chronic population-wide
level (Jimenez et al. 2010a, p. 1123).
Dog-biting lice (Trichodectes canis)
commonly feed on domestic dogs, but
can infest coyotes and wolves (Schwartz
et al. 1983, p. 372; Mech et al. 1985, p.
404). The lice can attain severe
infestations, particularly in pups. The
worst infestations can result in severe
scratching, irritated and raw skin,
substantial hair loss particularly in the
groin, and poor condition. While no
wolf mortality has been confirmed from
dog-biting lice, death from exposure or
secondary infection following selfinflicted trauma caused by
inflammation and itching, appears
possible. The first confirmed NRM
wolves with dog-biting lice were
members of the Battlefield pack in the
Big Hole Valley of southwestern
Montana in 2005 and 2006, and one
wolf in south-central Idaho in 2006 and
2007; but these infestations were not
severe (Service et al. 2006, p. 15;
Atkinson 2006, p. 5; Jimenez et al.
2010b). The source of this infestation is
unknown, but was likely domestic dogs.
Lice have been documented in the NRM
DPS since 2005, and infestations are
likely to continue to be occasionally
documented in the future. Lice may
contribute to the death of some
individual wolves, but they will not
threaten the GYA or Wyoming wolf
population (Jimenez et al. 2010b, p.
332).
Rabies, canine heartworm (Dirofilaria
immitus), blastomycosis, brucellosis,
neosporsis, leptospirosis, bovine
tuberculosis, canine herpesvirus
(Almberg et al. 2010), canine
coronavirus, viral papillomatosis,
hookworm, tapeworm (Echinococcus
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granulosus) (Foreyt et al. 2008, p. 1),
lice, scaroptic mange, coccidiosis, and
canine adenovirus/hepatitis have all
been documented in wild gray wolves,
but their impacts on future wild wolf
populations are not likely to be
significant (Brand et al. 1995, pp. 419–
429; Johnson 1995a, b, pp. 5–73, 1995b,
pp. 5–49; Mech and Kurtz 1999, p. 305;
Wisconsin Department of Natural
Resources 1999, p. 61; Kreeger 2003, pp.
202–214; Atkinson 2006, pp. 1–7;
Almberg et al. 2010, p. 3; Jimenez et al.
2010a, p. 1123; 2010b, p. 332). Canid
rabies caused local population declines
in Alaska (Ballard and Krausman 1997,
p. 242), and may temporarily limit
population growth or distribution where
another species, such as arctic foxes
(Alopex lagopus), act as a reservoir for
the disease. We have not detected rabies
in NRM wolves. Range expansion could
provide new avenues for exposure to
several of these diseases, especially
canine heartworm, rabies, bovine
tuberculosis, and possibly new diseases
such as chronic wasting disease and
West Nile virus, further emphasizing the
need for vigilant disease monitoring
programs.
Because several of the diseases and
parasites are known to be spread by
wolf-to-wolf contact, their incidence
may increase if wolf densities increase.
However, because wolf densities are
already high and may be peaking
(Service et al. 2011, Table 1, Figure 1),
wolf-to-wolf contacts will not likely
lead to a continuing increase in disease
prevalence. The wolves’ exposure to
these types of organisms may be most
common outside of the core population
areas, where domestic dogs are most
common, and lowest in the core
population areas—because wolves tend
to flow out of, not into, saturated
habitats. Despite this dynamic, most
Wyoming and GYA wolves will
continue to have exposure to most
diseases and parasites in the system.
Diseases or parasites have not been a
significant threat to wolf population
recovery to date, and we have no reason
to believe that they will become a
significant threat to the viability of GYA
and Wyoming populations in the
foreseeable future.
In terms of future disease monitoring,
States have committed to monitor the
NRM wolf population for significant
disease and parasite problems. State
wildlife health programs often cooperate
with Federal agencies and universities
and usually have both reactive and
proactive wildlife health monitoring
protocols. Reactive strategies consist of
periodic intensive investigations after
disease or parasite problems have been
detected through routine management
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practices, such as pelt examination,
reports from hunters, research projects,
or population monitoring. Proactive
strategies often involve ongoing routine
investigation of wildlife health
information through collection and
analysis of blood and tissue samples
from all or a sub-sample of wildlife
carcasses or live animals that are
handled. We do not believe that
diseases or changes in disease
monitoring will threaten recovered wolf
populations in the GYA or State of
Wyoming.
Natural Predation—No wild animals
routinely prey on gray wolves (Ballard
et al. 2003, pp. 259–260). From 1982 to
2004, about 3.1 percent of all known
wolf morality in the NRM DPS resulted
from interspecific strife (Murray et al.
2010, p. 2519). Occasionally wolves
have been killed by large prey such as
elk, deer, bison, and moose (Mech and
Nelson 1989, p. 207; Smith et al. 2006,
p. 247; Mech and Peterson 2003, p. 134),
but those instances are few. Since the
1980s, about a dozen NRM wolves have
died from wounds received while
attacking prey (Smith et al. 2006, p.
247). That level of natural mortality
does not significantly affect wolf
population viability or stability. Since
NRM wolves have been monitored, only
a few wolves have been confirmed
killed by other large predators. At least
two adults were killed by mountain
lions, and one pup was killed by a
grizzly bear (Jimenez et al. 2009, p. 76).
Wolves in the NRM region inhabit the
same areas as mountain lions, grizzly
bears, and black bears, but conflicts
rarely result in the death of either
species. Wolves evolved with other
large predators, and no other large
predators in North America, except
humans, have the potential to
significantly impact wolf populations.
Other wolves are the largest cause of
natural predation among wolves.
Numerous mortalities have resulted
from territorial conflicts between
wolves, and about 3 percent of wolf
deaths are caused by territorial conflict
in the NRM wolf population (Murray et
al. 2010, p. 2519). Wherever wolf packs
occur, including the NRM DPS, some
low level of wolf mortality will result
from territorial conflict. Wolf
populations tend to regulate their own
densities; consequently, territorial
conflict is highest in saturated habitats
like YNP. This cause of mortality is
infrequent except at carrying-capacity
and does not result in a level of
mortality that would significantly affect
a wolf population’s viability in
Wyoming, the GYA, or the NRM DPS.
Human-caused Predation—This
section discusses all sources of human-
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caused mortality except hunter harvest
and trapping. Hunting and trapping are
discussed in the ‘‘Commercial and
Recreational Uses’’ section of Factor B
above. Potential impacts of humancaused mortality to natural connectivity
and gene flow are discussed in the
‘‘Genetic Considerations’’ section of
Factor E below.
Humans kill wolves for a number of
reasons. For example, some wolves are
killed to resolve conflicts with livestock
(Fritts et al. 2003, p. 310; Woodroffe et
al. 2005, pp. 86–107, pp. 345–347).
Occasionally, wolf killings are
accidental (e.g., wolves are hit by
vehicles, mistaken for coyotes and shot,
or caught in traps set for other animals)
(Bangs et al. 2005, p. 346). Other wolf
killings are intentional, illegal, and are
never reported to authorities. A few
wolves have been killed by people who
stated that they believed their physical
safety was being threatened. The overall
NRM wolf mortality rate of 26 percent
since reintroduction is comprised of:
Illegal kills (10 percent), control actions
to resolve conflicts (10 percent), natural
causes including disease/parasites and
intraspecific strife (3 percent), and
accidental human causes such as
vehicle collisions and capture mortality
(3 percent). Eighty percent of the overall
NRM wolf mortalities are human-caused
(Murray et al. 2010; Smith et al. 2010;
USFWS et al. 2011, p. 7). While humancaused mortality, including both illegal
killing and agency control, has not
prevented population recovery, it has
affected NRM wolf distribution (Bangs
et al. 2004, p. 93) preventing successful
pack establishment and persistence in
open prairie or high desert habitats
(Bangs et al. 1998, p. 788; Bangs et al.
2009, p. 107; Service et al. 1989–2011,
Figure 1).
Wolf populations can maintain
themselves despite very high sustained
human-caused mortality rates of 22 to
greater than 50 percent (Keith 1983;
Ballard et al. 1987; Fuller 1989; Fuller
et al. 2003, pp. 182–184; Creel and
Rotella 2010). Mortality rates and
population growth rates reported from
2007 to 2010 indicate that the wolf
population in Wyoming outside YNP
can sustain, on average, a 36 percent
mortality rate from human causes
(WGFC 2011, p. 12). When populations
are maintained below carrying capacity
and natural mortality rates and selfregulation of the population remain low,
human-caused mortality can replace up
to 70 percent of natural mortality (Fuller
et al. 2003, p. 186). Wolf pups can also
be successfully raised by other pack
members (Boyd and Jimenez 1994), and
breeding individuals can be quickly
replaced by other wolves (Brainerd et al.
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2008, p. 89), which can serve to mitigate
the impacts of human-caused mortality.
Collectively, these factors indicate that
wolf populations are quite resilient to
moderate human-caused mortality, if it
is adequately regulated.
As part of the interagency wolf
monitoring program and various
research projects, over 20 percent of the
NRM wolf population has been
monitored since the 1980s (Smith et al.
2010, p. 620; Murray et al. 2010, p.
2514). From 1984 through 2004, annual
adult survival averaged about 75
percent, which typically allows wolf
population growth (Hensey and Fuller
1983, p. 1; Keith 1983, p. 66; Fuller et
al. 2003, p. 182; Smith et al. 2010, p.
620; Murray et al. 2010, p. 2514).
Wolves in the largest blocks of remote
habitat without livestock, such as
central Idaho or YNP, had annual
survival rates around 80 percent (Smith
et al. 2006, p. 245; Smith et al. 2010, p.
620). Wolves outside of large remote
areas had survival rates as low as 54
percent in some years (Smith et al. 2006,
p. 245; Smith et al. 2010, p. 626). The
highest mortality rates are localized in
areas we consider largely unsuitable for
pack persistence.
Wolf mortality resulting from control
of problem wolves, which includes legal
take by private individuals under
defense of property regulations, was
estimated to remove an average of 10
percent of adult radio-collared wolves
annually since reintroduction, but that
rate has steadily increased as the wolf
population has expanded beyond
suitable habitat and caused increased
conflicts with livestock (USFWS et al.
2011, Table 4, 5). Defense of property
take, authorized by experimental
population rules (Service 1994, pp.
2:13–14; 59 FR 60252, November 22,
1994; 59 FR 60266, November 22, 1994;
70 FR 1286, January 6, 2005; 73 FR
4720, January 28, 2008; 50 CFR 17.84(i)
& (n)), makes up a small percentage of
these control actions. Specifically, such
take represented about 7 percent of
problem wolves legally removed from
1995 to 2010 and about 9 percent of
such removals from 2008 to 2010. In
spite of these mortality rates, wolf
numbers increased at a rate of about 24
percent annually 1995–2008 (the period
when the population was presumed
below carrying capacity). Since 2008,
the NRM population has largely
stabilized.
After delisting, human-caused
mortality, and its authorization or
regulation, will differ in various parts of
Wyoming. In total, wolves will be
permanently managed as game animals
or protected (e.g., in National Parks) in
about 40,000 km2 (15,400 mi2) in
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northwestern Wyoming (15.7 percent of
Wyoming), including YNP, Grand Teton
National Park, John D. Rockefeller
Memorial Parkway, adjacent U.S. Forest
Service-designated Wilderness Areas,
adjacent public and private lands, the
National Elk Refuge, and the Wind River
Indian Reservation. This area is of
sufficient size to support Wyoming
population targets, under the
management regime proposed for this
area.
Wolves will be managed as trophy
game animals within the area of
northwestern Wyoming identified as the
WTGMA (see Figure 3). ‘‘Trophy game’’
status allows the WGFC and WGFD to
regulate methods of take, hunting
seasons, types of allowed take, and
numbers of wolves that could be killed.
The boundary and size of the WTGMA
will be established by State statute and
cannot be diminished through WGFC
rule or regulation.
The WTGMA will be seasonally
expanded approximately 80 km (50 mi)
south (see Figure 3) from October 15 to
the last day of February (28th or 29th)
to facilitate natural dispersal of wolves
between Wyoming and Idaho. During
this timeframe, the trophy game area
will be expanded by approximately
3,300 km2 (1,300 mi2) (i.e., an additional
1.3 percent of Wyoming). Management
within the WTGMA is described below,
followed by management in other
portions of Wyoming.
After delisting, Wyoming will allow
property owners inside the WTGMA to
immediately kill a wolf doing damage to
private property (WGFC 2011, pp. 3, 4,
22, 30–31, 32). WGFC regulation defines
‘‘doing damage to private property’’ as
‘‘the actual biting, wounding, grasping,
or killing of livestock or domesticated
animal, or chasing, molesting, or
harassing by gray wolves that would
indicate to a reasonable person that
such biting, wounding, grasping, or
killing of domesticated animals is likely
to occur at any moment’’ (WGFC 2011,
pp. 22, 60). These regulations will
define ‘‘owner’’ as ‘‘the owner, lessee,
immediate family, employee, or other
person who is charged by the owner
with the care or management of
livestock or domesticated animals’’
(WGFC 2011, p. 22). Wolves killed
under authority of this regulation shall
be reported to a WGFD representative
within 72 hours (WGFC 2011, pp. 22,
31). These regulations are similar to the
experimental population rules in place
in Montana and Idaho after the
population achieved recovery levels (70
FR 1286, January 6, 2005; 73 FR 4720,
January 28, 2008; 50 CFR 17.84(n)).
While in place in Montana and Idaho,
these rules were sufficiently protective
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to allow continued population
expansion (Service et al. 2011, Table 4).
We conclude that these rules will not
compromise the State of Wyoming’s
ability to meet the agreed-upon
population objectives (at least 10
breeding pairs and at least 100 wolves
outside YNP and sovereign tribal lands)
assuming the State manages for an
adequate buffer above these minimum
levels as Wyoming intends to do (WGFC
2011, p. 24).
Additionally, the WGFD may issue
‘‘lethal take permits’’ authorizing
property owners to kill not more than
two wolves in areas experiencing
chronic wolf depredation within the
WTGMA (WGFC 2011, pp. 22–23). The
Wyoming wolf plan defines ‘‘chronic
wolf depredation’’ as ‘‘a geographic area
limited to a specific parcel of private
land or a specific grazing allotment
described on the permit within the
WTGMA where gray wolves have
repeatedly (twice or more within a 2month period immediately preceding
the date on which the owner applies for
a lethal take permit) harassed, injured,
maimed or killed livestock or
domesticated animals’’ (WGFC 2011,
pp. 22–23, 60). Wolves killed under the
authority of a lethal take permit shall be
reported to the WGFD representative
specified on the permit within 24 hours
(WGFC 2011, pp. 3, 22–23). Lethal take
permits shall expire 45 days after the
date they are issued, but will be
renewable for up to a year if wolf
conflicts persist (WGFC 2011, pp. 22–
23, 32). Depending upon population
levels, Wyoming can suspend or cancel
existing lethal take permits or halt
issuance of new lethal take permits
(WGFC 2011, pp. 22–23, 32). These
regulations are similar to the
experimental population rules in place
in Montana and Idaho after the
population achieved recovery levels (70
FR 1286, January 6, 2005; 73 FR 4720,
January 28, 2008; 50 CFR 17.84(n)).
While in place in Montana and Idaho,
these rules were sufficiently protective
to allow continued population
expansion (Service et al. 2011, Table 4).
Additionally, we employed a similar
approach on private lands in Wyoming,
but not on public lands, and this was
sufficiently protective to allow for
continued population growth of
Wyoming’s wolf population outside
YNP (Service et al. 2002–2011, Table 2a;
Service et al. 2011, Figure 2 in Wyoming
chapter).
Some other minor sources of humancaused predation may also occur inside
the WTGMA. For example, accidental
mortality sometimes occurs from such
sources as vehicle collisions. Because
these types of mortalities are rare and
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have little impact on wolf populations,
they were authorized by our
experimental population rule with little
to no impact on wolf populations. Take
in self-defense or defense of others is
also exceedingly rare, and is expected to
remain rare post-delisting. We expect
take from these sources will remain rare
post-delisting with little impact on the
wolf population.
While wolves were listed, illegal
killing removed an estimated 10 percent
of the population annually. Following
our previous delisting, there was no
indication that illegal mortality levels
changed from those occurring while
wolves were delisted. After delisting,
WGFD law enforcement personnel will
investigate all wolves killed outside the
framework established by State statute
and WGFC regulation, and appropriate
law enforcement and legal action will be
taken. We expect illegal killing will
continue at current levels post-delisting.
Within the WTGMA, WGFD may also
control wolves when they determine a
wild ungulate herd is experiencing
unacceptable impacts or to address
wolf-ungulate conflicts at State-operated
elk feedgrounds (WGFC 2011, pp. 5, 39–
41). Wolf control to address
unacceptable impacts to wild ungulates
requires a determination that wolf
predation is a significant factor in the
population or herd not meeting the State
population management goals or
recruitment levels established for the
population or herd (WGFC 2011, pp. 5,
39–41). All of Wyoming’s 35 elk
management units are at or above the
State’s numeric objectives for those
herds; however, calf/cow ratios in
several herd units are below desired
levels (WGFD 2010, p. 1). Five of the
State’s ten moose herds are below
objectives (WGFD unpublished data).
Although Wyoming has not yet put
forward any proposals to control wolves
to address unacceptable impacts to
ungulate herds, such take is possible.
WGFD may also take wolves that
displace elk from feedgrounds in the
WTGMA if it results in one of the
following conflicts: (1) Damage to
private stored crops; (2) elk
commingling with domestic livestock;
or (3) displacement of elk from
feedgrounds onto highway rights-of-way
causing human safety concerns (WGFC
2011, pp. 5, 39–41). Because Wyoming
will consider all forms of wolf mortality
when making ungulate-related wolf
control management decisions (WGFC
2011, pp. 21, 23–24), these mortality
sources will not compromise the State’s
ability to maintain wolf management
objectives.
In the predator area, wolves will
experience unregulated human-caused
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mortality, although mortality in this
area will be monitored through
mandatory reporting within 10 days of
the kill (WGFC 2011, pp. 3, 8, 17, 23,
29). Wolves are unlike coyotes, in that
wolf behavior and reproductive biology
have resulted in wolves historically
being extirpated in the face of extensive
human-caused mortality. As we have
previously concluded (71 FR 43410,
August 1, 2006; 72 FR 6106, February 8,
2007; 73 FR 10514, February 27, 2008;
74 FR 15123, April 2, 2009), wolves are
unlikely to survive in portions of
Wyoming where they are regulated as
predatory animals. This conclusion was
validated in 2008 after our previous
delisting became effective and most of
the wolves in the predator area were
killed within a few weeks of losing the
Act’s protection. We expect that wolf
packs in the predator area of Wyoming
will not persist.
Despite this anticipated mortality, the
portions of Wyoming outside the
predator area are large enough to
support Wyoming’s management goals
and a recovered wolf population (Figure
1 illustrates wolf pack distribution
relative to Wyoming’s WTGMA). Our
2009 delisting rule confirmed this
conclusion, but expressed two concerns
(74 FR 15123, April 2, 2009). First, the
rule expressed concern that mortality in
the predator area would be high and this
would inhibit natural genetic exchange.
This issue is discussed in the ‘‘Genetic
Considerations’’ portion of Factor E
below.
The second concern expressed in our
2009 delisting rule (74 FR 15123, April
2, 2009) was that lone wolves, breeding
pairs, or packs from the trophy game
area may periodically and temporarily
disperse into the predator area and
suffer high mortality rates. The 2009
rule concluded that a large predator area
‘‘substantially increases the odds that
these periodic dispersers will not
survive, thus, impacting Wyoming’s
wolf population’’ (74 FR 15123, April 2,
2009). We continue to conclude that no
wolf packs or breeding pairs will persist
in the predator area of Wyoming, some
packs that have entire or partial
territories in the predator area will
likely not persist (3 of Wyoming’s 27
breeding pairs, and 6 of the State’s 30
packs have entire or partial territories in
the predator area), and some wolves that
primarily occupy the WTGMA will be
killed when dispersing into the predator
area. However, Wyoming’s overall
management strategy has been improved
to such an extent that such mortality
can occur without compromising the
recovered status of the population in
Wyoming.
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Such losses were a substantial
concern when State law required WGFD
to aggressively manage the population
down to minimal levels. However,
Wyoming has committed to remove
current statutory mandates for
aggressive management down to
minimum levels. Furthermore,
Wyoming has agreed to maintain a
population that remains at or above 10
breeding pairs and at or above 100
wolves in areas under their jurisdiction.
To accomplish this, Wyoming intends to
maintain an adequate buffer above
minimum population objectives to
accommodate an annual wolf hunt and
unpredicted mortality associated with
control actions, as well as, to ensure that
uncontrollable sources of mortality do
not drop the population below this
minimum population level (WGFC
2011, p. 24). Collectively, the plan
assures that unregulated human-caused
mortality in the predator area will not
compromise the recovered status of the
Wyoming wolf population.
The Shoshone and Arapaho Tribal
Fish and Game Department will manage
all wolves occurring on the Wind River
Indian Reservation according to their
approved wolf management plan (King
2007, in litt.; Shoshone and Arapaho
Tribal Fish and Game Department 2007,
entire). The plan allows any enrolled
member on tribal land to shoot a wolf
in the act of attacking livestock or dogs
on tribal land, provided the enrolled
member provides evidence of livestock
or dogs recently (less than 24 hours)
wounded, harassed, molested, or killed
by wolves, and a designated agent is
able to confirm that the livestock or
dogs were wounded, harassed,
molested, or killed by wolves (Shoshone
and Arapaho Tribal Fish and Game
Department 2007, p. 8). ‘‘In the act of
attacking’’ means the actual biting,
wounding, grasping, or killing of
livestock or dogs, or chasing, molesting,
or harassing by wolves that would
indicate to a reasonable person that
such biting, wounding, grasping, or
killing of livestock or dogs is likely to
occur at any moment (Shoshone and
Arapaho Tribal Fish and Game
Department 2007, p. 8). The plan also
allows the tribal government to remove
‘‘wolves of concern’’ (Shoshone and
Arapaho Tribal Fish and Game
Department 2007, p. 8). ‘‘Wolves of
concern’’ are defined as wolves that
attack livestock, dogs, or livestock
herding and guarding animals once in a
calendar year or any domestic animal
twice in a calendar year (Shoshone and
Arapaho Tribal Fish and Game
Department 2007, p. 8).
Criteria to determine when take will
be initiated are: (1) Evidence of the
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attack, (2) reason to believe that
additional attacks will occur, (3) no
evidence of unusual wolf attractants,
and (4) any certain animal husbandry
practices have been implemented
(Shoshone and Arapaho Tribal Fish and
Game Department 2007, p. 8). In
situations with chronic wolf
depredation, enrolled members may
acquire written authorization from the
tribes to shoot wolves on tribal land
after at least two separate confirmed
depredations by wolves on livestock,
livestock herding or guarding animals,
or dogs, and the tribes have determined
that wolves are routinely present and
pose a significant risk to the owner’s
livestock (Shoshone and Arapaho Tribal
Fish and Game Department 2007, p. 8).
Other forms of authorized humancaused mortality include take in defense
of human life, take needed to avoid
conflicts with human activities,
incidental take, accidental take,
scientific take, or take for humane
reasons (such as to aid or euthanize
sick, injured, or orphaned wolves)
(Shoshone and Arapaho Tribal Fish and
Game Department 2007, p. 8).
These regulations are similar to
experimental population rules currently
in place on the Wind River Indian
Reservation (70 FR 1286, January 6,
2005; 73 FR 4720, January 28, 2008; 50
CFR 17.84(n)). This type of take has not
proven a limiting factor for the area.
Furthermore, as stated in our 2007
approval letter, suitable habitat on the
Wind River Indian Reservation is
occasionally used by wolves, but is not
considered essential to maintaining a
recovered wolf population in Wyoming,
and any wolves that establish
themselves on tribal lands will be in
addition to those necessary for
management by the State of Wyoming
for maintaining a recovered wolf
population (King 2007, in litt.).
In YNP, human-caused mortality has
been, and is expected to continue to be,
very rare because park regulations are
very protective of wildlife with few
exceptions for authorized humancaused mortality. Accidental mortality
or defense of life mortality may occur,
but as in the rest of Wyoming, we expect
these sources of mortality will be
exceedingly rare. Another rare, but
potential source of human-caused
mortality is agency action to remove
habituated wolves that pose a threat to
human safety after nonlethal efforts
have failed to correct the behavior. In
2003, YNP developed a plan for the
management of habituated wolves in
YNP (YNP 2003, entire). YNP policies
indicate ‘‘removal of nuisance animals
may be undertaken to reduce a threat to
public health or safety’’ (YNP 2003, p.
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8). Further, management policies (YNP
2003, p. 8) state, ‘‘Where visitor use or
other human activities cannot be
modified or curtailed, the Service may
directly reduce the animal population
by using several animal population
management techniques * * *’’ that
include ‘‘destruction of animals by NPS
personnel or their authorized agents.’’
This is important in YNP because the
unusually high exposure wolves have to
people in YNP increases the likelihood
of unpredictable wolf behavior (YNP
2003, p. 9). To address such situations,
YNP has developed a management plan
which calls for increased public
education, monitoring, aversion
conditioning, and, if necessary, wolf
removal (YNP 2003, pp. 4, 9–12). This
approach, endorsed by the Service in
2003 (YNP 2003, p. 13), is authorized by
existing experimental population rules
(50 CFR 17.84(i)(3)(v)).
State, Tribal, and Federal (YNP)
management in Wyoming will ensure
that human-caused mortality never
threatens the recovered status of the
population. As discussed above, wolf
populations can maintain themselves
despite sustained human-caused
mortality rates of between 22 to greater
than 50 percent (Keith 1983; Ballard et
al. 1987; Fuller 1989; Fuller et al. 2003,
pp. 182–184; Creel and Rotella 2010),
with Wyoming-specific data from 2007
to 2010 indicating that the wolf
population in Wyoming outside YNP
can sustain, on average, a 36 percent
mortality rate from human causes
(WGFC 2011, p. 12). While wolves were
listed, total human-caused mortality
rates averaged about 23 percent
annually. Wolves have a very high
natural resilience to regulated humancaused mortality (Fuller et al. 2003, pp.
182–190). For example, in 2009, more
than 600 wolves died from all sources
of mortality (agency control including
defense of property, regulated harvest
(for the first time), illegal and accidental
killing, and natural causes), and the
population still grew by almost 5
percent.
After delisting, most human-caused
predation in Wyoming will be similar to
that which was in place under either the
1994 experimental population rules
(now governing most of Wyoming) or
the 2005 experimental population rules
(59 FR 60252, November 22, 1994; 59
FR 60266, November 22, 1994; 70 FR
1286, January 6, 2005; 73 FR 4720,
January 28, 2008; 50 CFR 17.84(i) & (n)),
as modified in 2008, governing
management over most of Idaho and
Montana in recent years. While some
allowed take will be more liberal (e.g.,
mortality in the predator area), resulting
in greater overall rates of human-caused
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predation post-delisting, the increase
will not compromise the State’s ability
to maintain the population above
recovery levels. All sources of mortality
will be monitored and considered in
State management decisions. Many
sources of authorized take can be
limited, if necessary, to keep the
population above recovery levels (e.g.,
the State can suspend lethal take
permits, agency control actions, or
hunting seasons). Finally, recognizing
some mortality will occur from
uncontrollable sources (e.g., some
wolves that primarily occupy the
WTGMA will be lost when they go on
routine dispersal events into the
predator area), Wyoming no longer
intends to aggressively manage the
population down toward minimal levels
(an approach we previously indicated
was unacceptable), and, in fact, intends
to maintain an adequate buffer above
minimum population objectives.
Collectively, this information indicates
that human-caused predation will be
managed to assure the Wyoming
population’s recovered status is never
compromised.
Factor D. The Inadequacy of Existing
Regulatory Mechanisms
This section provides an analysis of
State, tribal, and Federal regulatory
mechanisms to determine if they are
adequate to maintain the species’
recovered status in the absence of the
Act’s protections. By definition,
potential threats only require regulation
if they represent a threat in the absence
of regulation. This section focuses on
likely future population levels
anticipated to be maintained, noting
that human-caused mortality is the most
significant issue influencing these
levels. In short, if human-caused
mortality is adequately regulated and
population targets are sufficient to allow
for other potential unforeseen or
uncontrollable sources of mortality, no
other potential threats are likely to
compromise the population’s viability.
This section does not go into detail
about each individual threat factor or
source of mortality. Instead it includes
an overview with a focus on the
regulatory mechanism that addresses
each threat factor or source of mortality.
For a more detailed discussion of any
one potential threat, see the supporting
discussion under the specific applicable
Factor (i.e., A, B, C, or E).
National Park Service—Twenty
percent of the currently occupied
portions of Wyoming (defined in Factor
A above) and 23 percent of areas that are
protected or where wolves are regulated
as game animals occur within a National
Park (see Figure 1 above). From 2001 to
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the end of 2010, the wolf population in
YNP ranged from 96 to 171 wolves, and
between 6 to 16 breeding pairs, with an
average of 9.8 breeding pairs. While
some wolves and some wolf packs also
occur in Grant Teton National Park and
John D. Rockefeller Memorial Parkway,
these wolves and wolf packs usually
have a majority of their home range in
areas under the State of Wyoming’s
jurisdiction; thus, these wolves are only
subject to National Park Service
regulation when on National Park
Service lands.
The National Park Service Organic
Act (16 U.S.C. 1 et seq.) and the
National Park Service management
policies on wildlife generally require
the agency to conserve natural and
cultural resources and the wildlife
present within National Parks. National
Park Service management policies
require that native species be protected
against harvest, removal, destruction,
harassment, or harm through human
action, although certain parks may
allow some harvest in accordance with
State management plans (NPS 2006, p.
44). No population targets for wolves
will be established for the National
Parks. Instead, management emphasis in
National Parks after delisting will focus
on continuing to minimize the human
impacts on wolf populations (YNP 2003,
pp. 9–12). Thus, because of their
responsibility to preserve all native
wildlife, units of the National Park
System are often the most protective of
wildlife. In the case of the wolf, the
National Park Service Organic Act and
National Park Service policies will
continue to provide protection
following the proposed Federal
delisting. Natural sources of mortality
(e.g., disease) will occasionally impact
wolf populations in National Parks, but,
in light of adequate regulation of
intentional human-caused mortality,
impacts from these occasional events
will be temporary and not threaten the
population.
National Wildlife Refuges—Each unit
of the National Wildlife Refuge System
was established for specific purposes.
The National Elk Refuge was established
in 1912 as a ‘‘winter game (elk) reserve’’
(37 Stat. 293, 16 U.S.C. 673), and the
following year Congress designated the
area as ‘‘a winter elk refuge’’ (37 Stat.
847). In 1921, all lands included in the
refuge, or that might be added in the
future, were reserved and set apart as
‘‘refuges and breeding grounds for
birds’’ (Executive Order (E.O.) 3596),
which was affirmed in 1922 (E.O. 3741).
In 1927, the refuge was expanded to
provide ‘‘for the grazing of, and as a
refuge for, American elk and other big
game animals’’ (44 Stat. 1246, 16 U.S.C.
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673a). These purposes apply to all or
most of the lands now within the refuge.
In accordance with the National
Wildlife Refuge System Administration
Act of 1966 as amended (16 U.S.C.
668dd–668ee) by the National Wildlife
Refuge System Improvement Act of
1997, the Service, which manages the
National Elk Refuge, recently
announced a notice of intent to prepare
a Comprehensive Conservation Plan for
the refuge. Comprehensive Conservation
Plans guide management of wildlife and
their habitats on refuges (75 FR 65370,
October 22, 2010). This process is
ongoing.
The refuge’s nearly 25,000 acres
provide a winter home for one of the
largest wintering concentrations of elk;
in addition to the large elk herds, a freeroaming bison herd winters at the refuge
(75 FR 65370, October 22, 2010). Wolves
occurring on the National Elk Refuge
will be monitored, and refuge habitat
management will maintain the current
prey base for them (Kallin 2011, pers.
comm.; Smith 2007, pers. comm. as
cited by WGFC 2011, p. 18). Wolf
trapping or hunting will not be
authorized on the refuge (Kallin 2011,
pers. comm.). Because of the relatively
small size of the refuge, all of the wolves
and all of the packs that occur on the
refuge will also spend significant
amounts of time on adjacent Statemanaged lands. Thus, much like Grand
Teton National Park and John D.
Rockefeller Memorial Parkway, these
wolves are only subject to National
Wildlife Refuge regulation during the
small portion of their time spent on the
National Elk Refuge.
Tribal Lands—Wolves will be
managed as game animals on the Wind
River Indian Reservation. The Eastern
Shoshone and Northern Arapaho Tribes
govern this area and the Shoshone and
Arapaho Tribal Fish and Game
Department and the Service’s Lander
Wyoming Management Assistance
Office manage wildlife occurring on the
reservation. Wolf management on the
Wind River Indian Reservation is
guided by the Service-approved ‘‘Wolf
Management Plan for the Wind River
Reservation’’ (King 2007, in litt.;
Shoshone and Arapahoe Tribal Fish and
Game Department 2007, entire). Suitable
habitat on the Wind River Indian
Reservation supports a small wolf
population. While this area sometimes
supports packs, it has never supported
a breeding pair. The Wind River Indian
Reservation is not considered essential
to maintaining a recovered wolf
population in Wyoming, and any
wolves that establish themselves on
tribal lands will be in addition to those
necessary for management by the State
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of Wyoming for maintaining a recovered
wolf population (King 2007, in litt.).
Forest Service—Federal law indicates
Forest Service land shall be managed to
provide habitat for fish and wildlife
including wolves and their prey.
Specifically, under the National Forest
Management Act of 1976, as amended
(16 U.S.C. 1600–1614), the Forest
Service shall strive to provide for a
diversity of plant and animal
communities when managing national
forest lands. Similarly, the Multiple Use
and Sustained Yield Act (16 U.S.C. 528)
indicates National Forests are to be
managed for ‘‘wildlife and fish
purposes’’ among other purposes, and
the Federal Land Policy and
Management Act of 1976 (43 U.S.C.
1701) says public lands are to be
‘‘managed in a manner… that will
provide food and habitat for fish and
wildlife and domestic animals.’’
Wilderness areas are afforded the
highest protections of all Forest Service
lands. The Wilderness Act of 1964 (16
U.S.C. 1131–1136) states the following:
(1) New or temporary roads cannot be
built; (2) there can be no use of motor
vehicles, motorized equipment, or
motorboats; (3) there can be no landing
of aircraft; (4) there can be no other form
of mechanical transport; and (5) no
structure or installation may be built.
The following wilderness areas occur in
the WTGMA: all of the Absaroka
Beartooth, Fitzpatrick, Gros Ventre,
Jedediah Smith, North Absaroka,
Washakie, Teton, and Winegar Hole
Wilderness Areas as well as the
northern half of the Bridger Wilderness
Area.
Wilderness study areas are designated
by Federal land management agencies
(e.g., USDA Forest Service) as those
having wilderness characteristics and
being worthy of congressional
designation as a wilderness area. The
following wilderness study areas occur
in the WTGMA: The Dubois Badlands,
Owl Creek, and Whiskey Mountain
Wilderness Study Areas. Individual
National Forests that designate
wilderness study areas manage these
areas to maintain their wilderness
characteristics until Congress decides
whether to designate them as permanent
wilderness areas. This means that
individual wilderness study areas are
protected from new road construction
by Forest Plans. Therefore, activities
such as timber harvest, mining, and oil
and gas development are much less
likely to occur because the road
networks required for these activities
are unavailable. However, because these
lands are not congressionally protected,
they could experience changes in
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management prescription with Forest
Plan revisions.
This regulatory framework has been
adequate to achieve wolf recovery in
Wyoming and across the entire NRM
DPS without additional land use
restrictions. The Forest Service has a
demonstrated capacity and a proven
history of providing sufficient habitat
for wolves and their prey and the Forest
Service lands will continue to be
adequately regulated to provide for the
needs of wolves and their prey.
While the Forest Service manages and
regulates habitat and factors impacting
habitat, the Forest Service typically
defers to States on hunting decisions (43
U.S.C. 1732(b)). The primary exception
to this deference is the Forest Service’s
authority to identify areas and periods
when hunting is not permitted (43
U.S.C. 1732(b)). However even these
decisions are to be developed in
consultation with the States. Thus,
human-caused mortality and the
adequacy of the associated regulatory
framework are discussed under the
‘‘State Regulatory Mechanisms’’ section
below, as well as ‘‘Commercial and
Recreational Uses’’ section of Factor B,
and the ‘‘Human-caused Predation’’
section of Factor C.
State Regulatory Mechanisms—
Portions of the Wyoming WTGMA
under State jurisdiction will be
managed according to the WGFC 2011
Wyoming Gray Wolf Management Plan
(WGFC 2011, entire). This plan is
consistent with an agreement between
the Service and the State of Wyoming
(WGFC 2011, appendix I). While the
below summary reflects this plan,
conforming changes to Wyoming State
law and WGFC regulations are
necessary to implement this plan. We
expect these statutory and regulatory
changes will be made within the next
several months. If the statutory or
regulatory changes deviate significantly
from the changes in law that we expect
Wyoming to make, we may need to
reopen the comment period to provide
the public an opportunity to review and
comment once these changes are
finalized. Should Wyoming fail to make
the changes necessary to support a
recovered wolf population, delisting
will not occur and this proposal will be
withdrawn.
Within Wyoming’s WTGMA (see
Figure 1 above), wolves will be managed
as a game animal, which allows the
WGFC and WGFD to regulate methods
of take, hunting seasons, types of
allowed take, and numbers of wolves.
The boundary and size of the WTGMA
and its seasonal expansion, as set forth
in the agreement between the Service
and the State and reflected in
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Wyoming’s revised wolf management
plan, will be established by State
statute, which cannot be changed
through WGFC rule or regulation. This
area is of sufficient size to support
Wyoming population targets, assuming
implementation of Wyoming’s
management plan for this area. In
consideration of, and to address, Service
concerns about genetics and
connectivity, Wyoming included a
seasonal expansion of the WTGMA in
their management plan. From October
15 through the end of February, the
WTGMA will expand approximately 80
km (50 mi) south (see Figure 1 above).
This seasonal expansion will benefit
natural dispersal (for a more detailed
discussion of genetic connectivity, see
the ‘‘Genetic Considerations’’ section of
Factor E below).
Wolves that occur in the remainder of
Wyoming under State jurisdiction will
be classified as predators. Predatory
animals are regulated by the Wyoming
Department of Agriculture under Title
11, Chapter 6 of the Wyoming Statutes.
Under these regulations, wolves in
predator areas can be killed with very
few restrictions. As we have previously
concluded (71 FR 43410, August 1,
2006; 72 FR 6106, February 8, 2007; 73
FR 10514, February 27, 2008; 74 FR
15123, April 2, 2009), wolves are
unlikely to survive in portions of
Wyoming where they are regulated as
predatory animals. However, portions
outside the predator area are large
enough to support Wyoming’s
management goals and a recovered wolf
population (this issue is discussed
further in the ‘‘Human-caused
Predation’’ section of Factor C above as
well as the ‘‘Genetic Considerations’’
portion of Factor E below).
Within the WTGMA, wolves will be
managed by the WGFC and the WGFD.
The WGFC will direct the management
of wolves, and the WGFD will assume
management authority of wolves (WGFC
2011, p. 1). The State of Wyoming has
a relatively large and well-distributed
professional fish and game agency that
has the demonstrated skills and
experience to successfully manage a
diversity of resident species, including
large carnivores. The WGFD and WGFC
are similarly qualified to manage a
recovered wolf population. State
management of wolves will follow the
classic State-led North American model
for wildlife management which has
been extremely successful at restoring,
maintaining, and expanding the
distribution of numerous populations of
other wildlife species, including other
large predators, throughout North
America (Geist 2006, p. 1; Bangs 2008).
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Within the WTGMA, Wyoming has
agreed to maintain a population of at
least 10 breeding pairs and at least 100
wolves in areas under State jurisdiction.
This minimum population objective is
incorporated into Wyoming’s wolf
management plan and will be
institutionalized in Wyoming State
statute and regulation. To ensure this
target is never inadvertently
compromised, Wyoming intends to
maintain an adequate buffer above
minimum population objectives (WGFC
2011, p. 24). Additionally, Wyoming is
planning that any future population
reduction will be gradual to ensure
population targets are not compromised
while the State gathers information on
the vulnerability of wolves under a State
management regime. All sources of
mortality will be considered in
management decisions. These objectives
have been institutionalized into
Wyoming’s wolf management plan, will
be reflected in all WGFD and WGFC
planning decisions, and will be
reflected in WGFC regulations.
Wolves taken outside the framework
established by State statute and WGFC
regulation will be considered to have
been taken illegally and will be
investigated by WGFD law enforcement
personnel (WGFC 2011, p. 25).
Appropriate law enforcement and legal
action will be taken, which could
include fines, jail terms, and loss of
hunting privileges (WGFC 2011, p. 25).
We believe that these measures
constitute adequate regulatory
mechanisms to address the threat of
illegal killing of wolves.
Given the State of Wyoming’s
demonstrated capacity to manage
similar wildlife, their commitment to
manage wolves at or above agreed-upon
minimum population levels, along with
an overall approach that we conclude
will allow the State to meet its
objectives, we view the State of
Wyoming’s proposed management
strategy as an adequate regulatory
mechanism. However, as noted above,
additional statutory and regulatory
changes must occur for this plan to be
implemented as currently designed. We
expect these changes will be made over
the next several months and prior to any
final delisting of gray wolves in
Wyoming.
Because some GYA wolves and some
GYA packs cross State lines, Montana’s
and Idaho’s regulatory framework are
also discussed here. Furthermore,
management in these States can impact
dispersal across the entire region.
Montana statutes and administrative
rules categorize the gray wolf as a
‘‘Species in Need of Management’’
under the Montana Nongame and
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Endangered Species Conservation Act of
1973 (MCA 87–5–101 to 87–5–123).
Montana law defines ‘‘species in need of
management’’ as ‘‘The collection and
application of biological information for
the purposes of increasing the number
of individuals within species and
populations of wildlife up to the
optimum carrying capacity of their
habitat and maintain those levels. The
term includes the entire range of
activities that constitute a modern
scientific resource program, including,
but not limited to research, census, law
enforcement, habitat improvement, and
education. The term also includes the
periodic or total protection of species or
populations as well as regulated
taking.’’ Classification as a ‘‘Species in
Need of Management’’ and the
associated administrative rules under
Montana State law create the legal
mechanism to protect wolves and
regulate human-caused mortality
(including regulated public harvest)
beyond the immediate defense of life/
property situations. Some illegal
human-caused mortality likely still
occurs, and is to be prosecuted under
State law and Commission regulations.
Montana’s Fish, Wildlife, and Parks
Commission determine harvest quotas
annually.
The IFGC has authority to classify
wildlife under Idaho Code 36–104(b)
and 36–201. The gray wolf was
classified as endangered by the State
until March 2005, when the IFGC
reclassified the species as a big game
animal under Idaho Administrative
Procedures Act (13.01.06.100.01.d). As a
big game animal, State regulations
adjust human-caused wolf mortality to
ensure recovery levels are exceeded.
Title 36 of the Idaho statutes has
penalties associated with illegal take of
big game animals. These rules are
consistent with the legislatively adopted
Idaho Wolf Conservation and
Management Plan (IWCMP) (Idaho
2002) and big game hunting regulations
currently in place. The IWCMP states
that wolves will be protected against
illegal take as a big game animal under
Idaho Code 36–1402, 36–1404, and 36–
202(h). The IFGC determines harvest
quotas annually.
Montana, Idaho, and Wyoming are
committed to implement wolf
management in a manner that also
encourages connectivity among wolf
populations (Groen et al. 2008, entire;
WGFC 2011, pp. 26–29, 52, 54). Both
Montana’s and Idaho’s 2009 and 2011
hunts consider and minimize impacts to
natural connectivity. Additionally, the
States have committed to implement
agency-managed genetic exchange
(moving individual wolves or their
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genes into the affected population
segment), should it ever be needed
(Groen et al. 2008, entire; WGFC 2011,
pp. 26–29, 52, 54).
Montana’s and Idaho’s regulatory
frameworks are sufficient to ensure
impacts in Montana and Idaho to the
Wyoming wolf population will be
minimal. Should management needs be
identified in future years, both States
have regulatory authority to modify
management to meet this population
need. All three States have a strong
incentive to maintain the NRM DPS and
its subpopulations well above minimal
population levels.
Environmental Protection Agency—
The Federal Insecticide, Fungicide, and
Rodenticide Act (7 U.S.C. 136 et seq.)
provides for Federal regulation of
pesticide distribution, sale, and use. All
pesticides distributed or sold in the
United States must be registered
(licensed) by the Environmental
Protection Agency. Before the
Environmental Protection Agency may
register a pesticide, the applicant must
show, among other things, that using the
pesticide according to specifications
‘‘will not generally cause unreasonable
adverse effects on the environment.’’ No
poisons can currently be legally used to
poison wolves in the United States
because of Environmental Protection
Agency restrictions. However, sodium
cyanide (only in M–44 devices) and
Compound 1080 (sodium fluoroacetate
used only in livestock protection
collars) are legal toxicants for use on
other non-wolf canids. Sodium cyanide
was reregistered for use in M–44 devices
in 1994 (Environmental Protection
Agency 1994, entire). Compound 1080
(sodium fluoroacetate) was registered
for use in livestock protection collars in
1995 (Environmental Protection Agency
1995, entire). The Large Gas or Denning
Cartridge was registered for use in 2007
(Environmental Protection Agency 2007,
entire).
All three products have label
restrictions imposed by the
Environmental Protection Agency
consistent with a Service 1993
Biological Opinion to protect
endangered species (Environmental
Protection Agency 1994, p. 4;
Environmental Protection Agency 1995,
pp. 27, 32–38). It is a violation of
Federal law to use a pesticide in a
manner inconsistent with its labeling,
and the courts consider a label to be a
legal document (Environmental
Protection Agency 2011, p. 1). The
Environmental Protection Agency’s
regulation of these and other toxicants
has been adequate to prevent any
meaningful impacts to wolf populations
in Wyoming, the GYA, or the NRM DPS.
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These restrictions constitute an
adequate regulatory mechanism of this
potential issue.
Collectively, the above regulatory
framework will be considered adequate
to maintain recovered wolf populations
and to prevent relisting once Wyoming
makes the necessary changes to State
law and regulation required to
implement Wyoming’s wolf
management plan. Before delisting
occurs, this regulatory framework will
be formally established in management
plans, regulations, and statute. These
regulations will protect wolf
populations (in the case of the National
Park Service) or manage them
adequately above population targets to
ensure potential unforeseen or
uncontrollable sources of mortality do
not compromise population targets.
While no wolves are expected to persist
in the predator area, this area is not
necessary for wolf conservation in
Wyoming. Impacts could also occur in
adjacent portions of Montana and Idaho,
but these impacts are expected to be
minor (few wolf packs are
transboundary) and can be regulated
through limits on human-caused
mortality, if necessary. Additionally,
agency capacity and past practice with
wolves and other game species provide
confidence that targets will be met.
Finally, while not relied upon, we
believe the threat of relisting provides
additional certainty the objectives will
never be compromised.
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Factor E. Other Natural or Manmade
Factors Affecting Its Continued
Existence
This section discusses public
attitudes toward wolves, genetics,
poison, climate change, catastrophic
events, and potential impacts of humancaused mortality to pack structure. This
analysis focuses on Wyoming, but
considers information from beyond
Wyoming when such information helps
inform our understanding of an issue
and its potential impact to wolves in
Wyoming or the GYA.
Public Attitudes Toward the Gray
Wolf—Human attitudes toward wolves
were the main reason the wolf was
listed under the ESA because those
attitudes resulted in Federal, State, and
local governments promoting wolf
extirpation by whatever means possible,
including widespread poisoning, even
in National Parks (see also Poisoning
section below). Those attitudes were
largely based on the real and perceived
conflicts between humans and wolves,
primarily in the context of livestock and
pet depredation, hunting of ungulates,
and concerns for human safety.
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Public hostility toward wolves led to
the government-sanctioned persecution
that extirpated the species from the
NRM DPS in the 1930s. Negative
attitudes toward wolves remain deeply
ingrained in some individuals and
continue to affect human tolerance of
wolves. Many papers recently addressed
the concept of recent human tolerance
of wolves and how those attitudes might
affect wolf restoration (Kellert et al.
1996, p. 977; Kellert 1999; p. 167;
Zimmermann et al. 2001, p. 137; Ench
and Brown 2002, p. 16; Williams et al.
2002, p. 1; Ericsson and Heberlein 2003,
p. 149; Fritts et al. 2003, pp. 289–316;
Bruskotter et al. 2007, p. 211; Karlsson
and Sjostrom 2007, p. 610; Stronena et
al. 2007, p. 1; Herberlein and Ericsson
2008, p. 391; Bruskotter et al. 2009, p.
119; Wilson and Bruskotter 2009, p.
353; Bruskotter 2010b, p. 1; Bruskotter
et al. 2010a, p. 941; Bruskotter et al.
2010b, p. 30; Houston et al. 2010, p. 2;
Treves and Martin 2010, p. 1; Treves et
al. 2010, p. 2; for additional references
see USFWS 1994, Appendix 3; 76 FR
26086, May 5, 2011).
These public attitudes began to shift
in the mid-20th century because of
increased urbanization and increasing
national concerns about environmental
issues. However, huge decreases in wolf
abundance due to wolf extirpation in
the last century, lack of first-hand
experience with wolves and the damage
they can cause, and increasing
urbanization has resulted in most
Americans holding favorable attitudes
towards wolves. These same societal
shifts in human attitudes have occurred
in other parts of the world (Boitani
2003, p. 321). The huge shift in human
attitudes and the resulting treatment of
wolves compared to 100 years ago is
evident by the shift in policies
throughout North America and other
parts of the world from extirpation to
restoration (Boitani 2003, pp. 322–323;
Boitani and CuCiucci 2010, pp. 19–21).
Today, a majority of Americans view
wolves favorably for a multitude of
reasons. Wolves are considered
beneficial to ecosystem health. And it is
now considered appropriate to reverse
wolf extirpation, a perceived historic
wrong (Houston et al. 2010, p. 27).
Despite the variety of opinions,
research is scarce on what factors
increase human tolerance of wolves and
how those translate into conservation
success by preventing excessive rates of
human-caused mortality (Bath and
Buchanan 1980; Williams et al. 2002;
Ericsson et al. 2003; Fritts et al. 2003).
The groups most supportive of wolf
conservation are often members of
environmental organizations and urban
residents. These individuals often view
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wolf reintroduction as restoring an
ecological balance. However, favorable
attitudes toward wolves decrease as
people experience, or think they might
soon experience, living with wolves
(Huston et al. 2010, p. 1).
Typically, the groups most likely to
oppose wolf recovery are livestock
producers, hunters, and rural residents
within or near potential wolf habitat.
These individuals face a higher
probability of directly suffering
competition or damage from wolves.
Numerous public attitudes surveys
indicate human attitudes toward wolves
improve when there is local
participation in wildlife management
through regulated harvest and defense
of life and property regulations. Surveys
also show improvement in attitudes
when people can pursue traditional
activities, like hunting and grazing,
without restrictions (For references see
Service 1994, Appendix 3; Williams et
al. 2002; IDFG 2008; Houston et al.
2010; 76 FR 26086, May 5, 2011). Wolf
conservation can be successful even in
areas with high human density, if
management policies factor-in human
concerns (Linnell et al. 2001, p. 345).
A 1994 summary of human values
surveys (USFWS 1994, Appendix 3)
found that the overriding concern of
those living with wolves is the financial
and emotional loss that occurs when
wolves kill livestock. Further
illustrating the connection between
financial cost/benefit and attitudes, one
survey found Alaskan trappers (who
legally harvest wolves for their pelts)
had the most accurate knowledge of
wolves and viewed wolves the most
favorably (Kellert 1985). Toward this
end, compensation programs for wolflivestock depredations have benefited
attitudes toward wolves. Wyoming
intends to continue such programs in
trophy game portions of the State.
Allowing landowners to defend their
property may have also ameliorated
some of the concern related to potential
wolf-livestock conflicts. For example,
from 1995 through 2004, the highest rate
of illegal killing occurred in
northwestern Montana, where wolves
were listed as endangered and legal
protection was highest, compared to
central Idaho and the GYA where
wolves were managed under more
liberal experimental population
regulations. However, the difference in
habitat security might also explain the
differences in rates of human-caused
mortality (Smith et al. 2010, p. 630).
Upon delisting, Wyoming intends to
implement regulations similar to our
experimental population regulations.
State management provides a larger and
more effective local organization and a
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more familiar means for dealing with
these conflicts (Mech 1995, pp. 275–
276; Williams et al. 2002, p. 582; Bangs
et al. 2004, p. 102; Bangs et al. 2009, pp.
112–113). We anticipate this approach
will continue to benefit public attitudes
post-delisting.
Additionally, hunter’s perceptions of
wolves vastly improve when
opportunity for hunting is allowed
(IDFG 2007, p. 54). IDFG and MFWP
biologists (Dickson 2010; Maurier 2010,
pp. 1–2; IDFG 2007, pp. 43–47) reported
that many big game hunters coming
through mandatory hunter check
stations in 2008 were extremely agitated
and angry about wolves. In 2009, when
wolves were delisted and there was a
fair-chase hunting season, few hunters
complained. In 2010, when the court
order had relisted wolves, local
frustration and negative opinions about
wolves erupted to previously
unforeseen levels. Hunters and most
hunter organizations were again very
upset and frustrated; some went as far
as to call for illegal killing by shooting,
and a few even called for poisoning
wolves.
Similarly, in Wisconsin in 2006
(before wolves were delisted for 19
months in 2007–2008), 17 illegal kills
were discovered, including 9 killed
during the 9-day firearm deer season.
When wolves were delisted in 2007 and
lethal control of problem wolves was
allowed by the State, illegal kills
decreased to 11 overall with only 1
during the firearm deer season, and 5 of
these were deemed to be accidental
shootings outside of regular wolf range.
Notably, the wolf population steadily
increased throughout this period
(Wydeven 2010). Although the small
sample size does not allow any firm
conclusions, we believe this example
illustrates that local human tolerance of
wolves is the most critical factor in long
term wolf conservation. Keeping a large,
recovered wolf population listed under
the ESA fuels negative attitudes rather
than resolving them (Bangs et al. 2009,
pp. 112–113).
Regulated public harvest has also
been successfully used for a host of
other species to garner local public
tolerance for restoration efforts (Geist
2006, p. 285). The success of this
approach is illustrated by the
conservation of mountain lions and
black bears, which were also once
persecuted throughout most of North
America. These species were recovered
by State and tribal fish and game
agencies and hunters with much less
controversy than the recovery of wolves.
The recovery of those other species
included regulated public harvest from
the beginning of restoration efforts.
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Likewise, the Canadian Provinces
restored wolf populations throughout
large portions of their historic range by
‘‘harvesting’’ them back to fully
recovered levels (Pletscher et al. 1991,
p. 545). In 2009 and 2010, Sweden used
hunters to cap the population at 220
wolves, in part, to promote public
tolerance for wolf restoration (Liberg
2010, pers. comm.).
We believe public tolerance of wolves
will improve as wolves are delisted and
hunters start to see wolves as a trophy
animal with value. We believe this
process has already begun in other
delisted areas; however, it will likely
take time for the full effects of this
increased control over the resource and
the related sense of ownership before
tangible benefits in improved public
opinion and less extreme rhetoric are
realized. Public acceptance is highest
where wolves never disappeared and
where wolf populations are typically
healthy (or perhaps just with much
longer periods of exposure to wolves)
(Houston et al. 2010, pp. 19–20).
However, it has not been determined
whether this is due more to increased
knowledge and experience dealing with
wolves or relaxed local management
policies (including liberal public
harvest and defense of property
regulations) to address local conflicts.
The State of Wyoming has developed
a strategy that will not only provide for
wolf recovery, but also allow
consideration of the diverse opinions
and attitudes of its citizens. Wyoming’s
plan promotes wolf occupancy of
suitable habitat in a manner that
minimizes damage to private property,
allows for continuation of traditional
western land-uses such as grazing and
hunting, and allows for direct citizen
participation in, and funding for, State
wolf management (in the form of State
defense of property and hunting
regulations). With the continued help of
private conservation organizations,
Wyoming and the Tribes will continue
to foster public support to maintain a
recovered wolf population. The WGFD
has staff dedicated to providing accurate
and science-based public education,
information, and outreach (WGFC 2011,
pp. 41–42). Wyoming’s comprehensive
approach to wolf management provides
us with confidence that human attitudes
toward wolves should not again
threaten wolves in Wyoming.
As noted above, wolf conservation is
dependent on human tolerance (Boitiani
2003, p. 317; Fritts et al. 2003, p. 289)
and on the rate of human-caused
mortality (Fuller et al. 2003, pp. 184–
185) far more than any other factor.
Regarding the former, State management
will likely improve tolerance of wolves
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as the public appreciates increased State
control (less Federal control), and
increased management flexibility,
including hunting. When one considers
that current human attitudes were
sufficient to achieve wolf restoration,
and that we expect State management to
improve these attitudes, we no longer
view this as a threat to wolves in
Wyoming.
Furthermore, to the extent any impact
from human tolerance (or lack thereof)
is realized, it will affect human-caused
mortality. Wyoming’s plan provides
assurance that human-caused mortality
will be adequately regulated to ensure
recovery is never compromised. Thus,
we no longer consider human attitudes
to be a threat to the gray wolf in
Wyoming.
Genetic Considerations—Overall,
NRM wolves are as genetically diverse
as their vast, secure, healthy,
contiguous, and connected populations
in Canada (Forbes and Boyd 1997, p.
1089; vonHoldt et al. 2007, p. 19;
vonHoldt et al. 2008, p. 267) and, thus,
genetic diversity is not a wolf
conservation issue in the NRM DPS at
this time (Hebblewhite et al. 2010, p.
4383; vonHoldt et al. 2010, pp. 4412,
4416, 4421). This current genetic health
is the result of deliberate management
actions by the Service and its
cooperators since 1995 (Bradley et al.
2005, p. 1504). Furthermore, genetic
data collected from 1995 to 2004
demonstrate that all subpopulations
within the NRM DPS maintained high
genetic diversity during the first 10
years after reintroduction (vonHoldt et
al. 2010, p. 4423, Hebblewhite et al.
2010, p. 4384). Genetic diversity has
likely changed little since 2004. Below
we analyze whether genetics will
become a threat to wolves in Wyoming
or the GYA within the foreseeable
future.
Wolves have an unusual ability to
rapidly disperse long distances across
virtually any habitat and select mates to
maximize genetic diversity. Only
extremely large bodies of water or vast
deserts appear to restrict wolf dispersal
(Linnell et al. 2005). Wolves are among
the least likely species to be affected by
inbreeding when compared to nearly
any other species of land mammal
(Fuller et al. 2003, pp. 189–190; Paquet
et al. 2006, p. 3; Liberg 2008, p. 1).
Wolves avoid inbreeding by dispersing
to find unrelated mates (Bensch et al.
2006, p. 72; vonHoldt et al. 2007, p. 1).
This social pattern is a basic function of
wolf populations and occurs regardless
of the numbers, density, or presence of
other wolves (Mech and Boitani 2003,
pp. 11–180; Jimenez et al. 2011, p. 14).
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As a general rule, genetic exchange of
at least one effective migrant (i.e., a
breeding migrant that passes on its
genes) per generation is viewed as
sufficient to prevent the loss of alleles
and minimize loss of heterozygosity
within subpopulations (Mills 2007,
p.193). This level of gene flow allows
for local evolutionary adaptation while
minimizing negative effects of genetic
drift and inbreeding depression (Mills
2007, p. 193). The northwestern
Montana and central Idaho core
recovery areas are well-connected to
each other and to large wolf populations
in Canada through dispersal (Boyd et al.
1995, p. 136; Boyd and Pletscher 1999,
pp. 1100–1101; Hebblewhite et al. 2010,
p. 4383; vonHoldt et al. 2010, pp. 4422–
4423; Jimenez et al. 2011, p. 23).
The GYA is the most isolated core
recovery area within the NRM DPS
(Oakleaf et al. 2005, p. 554; vonHoldt et
al. 2007, p. 19). From 1992 to 2008, we
documented five radio-collared wolves
naturally entering the GYA, two of
which are confirmed to have bred
(Service et al. 2011, p. 2; Jimenez et al.
2011, p. 23). The first wolf dispersed
from northwestern Montana to the
eastern side of the GYA in 1992 when
only 41 wolves and 4 breeding pairs
were in the region (Pletscher et al. 1997,
p. 464). Because this dispersal predated
the 1995–1996 reintroductions, this
wolf did not breed as there were no
other wolves present for it to breed
with. In 2002, a central Idaho wolf
dispersed to the eastern side of the GYA
and became the breeding male of the
Greybull pack near Meeteetse,
Wyoming. In 2006, another central
Idaho wolf dispersed to the northern
edge of the GYA (south of Bozeman,
Montana); it is unknown if this wolf
bred. In 2007, two wolves from central
Idaho dispersed to the eastern side of
GYA. One of these dispersers joined a
pack near Dubois, Wyoming; its
reproductive status is unknown. The
other 2007 disperser joined a pack near
Sunlight Basin, Wyoming, and bred.
Because only 20 to 30 percent of the
NRM wolf population has been radiocollared, it is reasonable to assume that
approximately three times the
documented number of radio-collared
wolves dispersed into the GYA. On
average, about 35 percent of dispersing
wolves reproduce (Jimenez et al. 2011,
p. 12). Because a wolf generation is
approximately 4 years, dispersal data
indicates that more than one effective
migrant per generation has likely
entered into the GYA wolf population.
Specifically, these data indicate we may
have averaged around one-and-a-half
effective migrants per generation since
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reintroduction, with a large portion of
this dispersal occurring in recent years
when the central Idaho population was
above 500 wolves.
Genetics data have only been
analyzed from 1995 to 2004 when the
NRM gray wolf population was between
101 and 846 wolves (including a
minimum population estimate of 14 to
452 wolves in central Idaho) and still
growing (average 27 percent annual
growth rate). During this period, the
NRM region demonstrated a minimum
of 3.3 to 5.4 effective migrants per
generation among all three
subpopulations (vonHoldt et al. 2010, p.
4412). Within this range, the 3.3
effective migrants per generation reflect
natural dispersal, while the 5.4 effective
migrants per generation include humanassisted migration (Stahler 2011, in
litt.). Within the GYA, natural dispersal
data demonstrates that six wolves in
four packs appear to have descended
from one central Idaho disperser (the
2002 disperser discussed in the above
paragraph who was the breeding male of
the Greybull pack near Meeteetse,
Wyoming) (vonHoldt et al. 2010, p.
4412, Supporting Table S5; Stahler
2011, in litt.). These data demonstrate a
minimum of 0.42 natural effective
migrants entering the GYA per
generation during the 10-year study
period (Stahler 2011, in litt.). Because
only about 30 percent of the NRM wolf
population was sampled, the minimum
estimate of effective migrants per
generation was likely a significant
underestimate (Hebblewhite et al. 2010,
p. 4384; vonHoldt et al. 2010, pp. 4422–
4423; Stahler 2011, in litt.). While
additional analysis may be needed to
determine how much of an
underestimate this represents (Stahler
2011, in litt.), Hebblewhite et al. (2010,
p. 4384) suggest this estimate is ‘‘almost
certainly low by at least half.’’
Both of the above information sources
(documented dispersal rates and genetic
analysis) reflect past dispersal patterns
when the population was at different
levels and the Act’s protections
remained in place. Post-delisting,
populations will no longer be growing,
may go through a period of population
reduction before leveling off, and
management will likely result in higher
mortality rates for both dispersers and
resident wolves. Thus, past dispersal
data is unlikely to be reflective of future
effective migration rates. Below we
discuss factors likely to influence future
effective migration post-delisting.
A more detailed look at dispersal
data, although reflective of the situation
while listed, may provide insights into
likely dispersal after delisting. NRM
gray wolf dispersal data from 1995 to
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2008 indicated that: wolves routinely
dispersed at all population levels and
from packs of all sizes (10 percent of the
wolf population dispersed annually);
some dispersers moved long distances
despite the occurrence of empty suitable
habitat nearby (23 percent of these
dispersers traveled greater than or equal
to 100 miles, a distance that separates
routinely occupied areas in the GYA
and central Idaho); wolves dispersed in
all directions (19 percent of dispersers
traveled east as would be necessary to
get from central Idaho to the GYA);
dispersal occurred year round, but
peaked in winter (more than half of all
dispersal occurred in the 4 months of
November through February); dispersal
was a long, meandering process
(dispersal events averaged 5.5 months);
disperser survival rates were lower than
for resident wolves (70 versus 80
percent); and 35 percent of dispersing
wolves reproduced (Jimenez et al. 2011,
pp. 9–12). While these data could be
used to model likely future effective
migration, natural changes to the wolf
population and post-delisting
management across the NRM region will
impact these variables and impact the
resulting projections. Below we discuss
factors that are likely to change these
variables in future years.
Several geographic and biological
factors influence migration in the GYA.
For example, physical barriers (such as
high-elevation mountain ranges that are
difficult to traverse in winter) appeared
to discourage dispersal through Grand
Teton National Park’s western
boundary. As most wolves disperse in
winter, they tended to travel through
low-elevation valleys where wild prey
concentrations were highest due to
lower snow depths. Limited social
openings in YNP wolf packs also
directed wolves dispersing from Idaho
and Montana around YNP. To date, the
high density and reproductive output of
wolves in YNP has created a
unidirectional flow of dispersing wolves
out of the Park (vonHoldt et al. 2007, p.
270; vonHoldt et al. 2010, p. 4413;
Wayne and Hedrick 2010). This is
because young dispersing wolves seek
to establish territories in less saturated
habitats, and wolves from outside YNP
are unable to establish residency inside
areas that appear saturated. The lack of
dispersal into YNP is likely to change as
the wolf population continues its
decline into a lower long-term
equilibrium (Smith 2010, pers. comm.).
We expect that at lower YNP population
densities, wolves from outside YNP will
be increasingly successful at dispersing
into YNP.
Population levels across the NRM
DPS could impact natural rates of gene
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flow. For example, because 10 percent
of wolves disperse annually, an Idaho
wolf population of around 500 wolves
long term (a level we continue to think
is likely) will produce many more
dispersers than a population closer to
minimum recovery targets. While the
wolf population will almost certainly be
reduced post-delisting, all three States
in the NRM metapopulation plan to
manage wolf populations comfortably
above minimum recovery levels to allow
for wolf hunting opportunities, in
anticipation of uncontrollable sources of
mortality, and to ensure relisting never
occurs. Based on the available suitable
habitat including remote or protected
areas, management direction being
employed or planned by the States, and
State projections, we conclude that the
overall NRM population is likely to be
maintained well above recovery levels
(perhaps around 1,000 wolves across the
NRM DPS). Overall, we believe State
management of population levels alone
is unlikely to reduce the overall rate of
natural dispersal enough to threaten
adequate levels of effective migration.
However, if the population is
maintained near the minimum recovery
target of 150 wolves per State, a scenario
we view as extremely unlikely, we
would expect dispersal to noticeably
decrease. As discussed below, if genetic
exchange drops below one effective
migrant per generation, the States will
implement a human-assisted migration
program (i.e., translocating wolves).
Human-caused wolf mortality is
another key factor in determining
whether dispersers become effective
(i.e., a breeding migrant that passes on
its genes). In short, wolves must be able
to traverse suitable and unsuitable
habitat between the key recovery areas
and survive long enough to find a mate
in suitable habitat and reproduce. While
managed under the Act, dispersers had
a 70 percent survival rate. However,
State and tribal wolf management is
likely to reduce survival of dispersing
wolves. Across the NRM DPS, we expect
mortality rates to increase post-delisting
due to hunting, slightly more liberal
defense of property allowances and, in
Wyoming, control of wolves on Statemanaged elk feeding grounds and
removal in the predator area of the
State.
As noted above, wolves can maintain
population levels despite sustained
human-caused mortality rates of 22 to
greater than 50 percent (Keith 1983;
Ballard et al. 1987; Fuller 1989; Fuller
et al. 2003, pp. 182–184; Creel and
Rotella 2010). In Wyoming outside YNP,
mortality rates and population growth
rates from 2007 to 2010 suggest that the
Wyoming wolf population can sustain,
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on average, a 36 percent mortality rate
from human causes (WGFC 2011, p. 12).
Because States intend to initially reduce
wolf populations and ultimately
maintain level populations in balance
with prey populations, it seems
reasonable to assume that there will be
high mortality across the entire region
for the next several years, but that the
population will stabilize within a
sustainable level over the long term.
Furthermore, we expect human-caused
mortality will likely continue to be low
in remote and protected areas, and will
increase in unsuitable habitat which
dispersers must traverse to move
between subpopulations.
The management approaches of all
three NRM States take into account and
limit hunting impacts during important
dispersal periods, including the
breeding, denning, and pup rearing
periods (later winter through early fall).
Across Montana, Idaho, and Wyoming,
most hunting-related mortality will
occur in October and November when
big game seasons are scheduled and
most big game hunters are in the field.
In Montana in 2009, 78 percent of
harvested wolves were opportunistically
harvested by hunters who were
primarily hunting elk, deer, or both
(MFWP 2009, p. 3). In both 2009 and
2011, Montana’s wolf seasons were
scheduled to run through the end of
December, or when quotas were met
(MFWP 2011, entire). In 2009, Idaho’s
wolf season was open until December
31st or until the quota was met, but was
extended through the end of March for
all units that did not meet their quota.
The 2009 hunting season was not
extended in any areas important for
dispersal. In 2011, Idaho’s wolf hunting
season runs through March for most
units, but ends December 31st for those
areas thought important for dispersal
(i.e., the Beaverhead and Island Park
units) (IFGC 2011, entire). Such
considerations are consistent with
States’ commitments to preserve genetic
diversity by ensuring the continuation
of natural dispersal among the
subpopulations through effective
management of the timing and location
of human-caused mortality (Groen et al.
2008, entire). Additionally, State
management restricts problem wolf
control to recent depredation events,
which are uncommon during peak
dispersal periods.
The State of Wyoming has indicated
their hunting seasons will occur
primarily in conjunction with fall
hunting seasons, but may be extended
beyond that period, if necessary, to
achieve management objectives (WGFC
2011, pp. 2–3, 16, 25, 53). Wyoming will
develop a hunt plan each year that will
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take into consideration, but will not be
limited to, the following when
considering extending their hunting
program: wolf breeding seasons; shortand long-range dispersal opportunity,
survival, and success in forming new or
joining existing packs; conflicts with
livestock; and the broader game
management responsibilities related to
ungulates and other wildlife (WGFC
2011, pp. 2–3, 16, 25, 53).
In Wyoming, survival of dispersing
wolves will also be reduced in portions
of the State where wolves will be
classified as predators. In the predator
area, human-caused mortality will be
unregulated; therefore, wolf survival
rates will decline. This finding is
consistent with past Service findings (71
FR 43410, August 1, 2006; 72 FR 6106,
February 8, 2007; 73 FR 10514, February
27, 2008; 74 FR 15123, April 2, 2009),
and was validated in 2008 when most
of the wolves in the predator area were
killed within a few weeks of temporarily
losing the Act’s protection. However, we
believe roaming dispersers will be less
prone to unregulated removal than
resident packs, whose locations and
ranges are easily detected.
In total, wolves will be permanently
protected or managed as game animals
in about 39,900 km2 (15,400 mi2) (15.7
percent of Wyoming) in northwestern
Wyoming, including YNP, Grand Teton
National Park, John D. Rockefeller
Memorial Parkway, adjacent U.S. Forest
Service-designated Wilderness Areas,
adjacent public and private lands, the
National Elk Refuge, and the Wind River
Indian Reservation. The permanent
WTGMA incorporates nearly all of
Wyoming’s current wolf packs and
includes the vast majority of the State’s
suitable habitat. Additionally, the
WTGMA will be seasonally expanded
approximately 80 km (50 mi) south
along the western border of Wyoming
(see Figure 1 above) from October 15 to
the end of February (28th or 29th).
During this period of peak dispersal, the
trophy game area will be expanded by
approximately 3,300 km2 (1,300 mi2)
(i.e., an additional 1.3 percent of
Wyoming). Maintenance of genetic
exchange and connectivity were the
primary considerations in Wyoming’s
agreement to increase protection for
wolves within this area during winter
months. This seasonal expansion will
benefit natural dispersal.
Within the WTGMA, Wyoming may
also control wolves to address wolfungulate conflicts at State-operated elk
feeding grounds (WGFC 2011, pp. 5, 39–
41). Wyoming maintains 22 winter elk
feeding grounds including 10 within the
permanent WTGMA, 3 within the
seasonal WTGMA, and 9 within the
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permanent predator area. These areas
attract and could potentially hold
dispersing wolves. Many dispersing
wolves in Wyoming, and even some
established breeding pairs, temporarily
leave their primary territories to visit
the elk feed grounds in winter. As noted
above, within the predator area, take
would occur without limit and would
be unregulated. Within the WTGMA,
WGFD may take wolves that displace
elk from feeding grounds in the
WTGMA if such displacement results in
one of the following conflicts: (1) Elk
damage to private stored crops; (2) elk
commingling with domestic livestock;
or (3) elk displaced from feeding
grounds moving onto highway rights-ofway and causing human safety
concerns. Such take will likely further
reduce survival of dispersing wolves
(WGFC 2011, pp. 5, 39–41).
Human-caused mortality may also
provide a potential benefit to genetic
exchange. Specifically, State
management practices will periodically
create localized disruptions of wolf pack
structure or modified wolf density in
select areas of suitable habitat that will
create social vacancies or space for
dispersing wolves to fill. This outcome
will likely increase reproductive success
rates for dispersers that enter the GYA.
Generally, genetic connectivity across
the NRM DPS has increased with time,
and it will remain a high-priority issue
for the Service and our partner wildlife
agencies. A process to identify,
maintain, and improve linkage of
wildlife movement areas between the
large blocks of public land in the region
is ongoing (Servheen et al. 2003, p. 3).
This interagency effort involves 9 State
and Federal agencies working on
linkage facilitation across private lands,
public lands, and highways (Interagency
Grizzly Bear Committee 2001, pp. 1–2;
Brown 2006, pp. 1–3). Key partners
include the Forest Service, National
Park Service (NPS), Bureau of Land
Management, U.S. Geological Survey,
and States of Idaho, Montana,
Washington, and Wyoming. To date,
this effort has included: (1)
Development of a written protocol and
guidance document on how to
implement linkage zone management on
public lands (Public Land Linkage
Taskforce 2004, pp. 3–5); (2) production
of several private land linkage
management documents (Service 1997;
Parker and Parker 2002, p. 2); (3)
analyses of linkage zone management in
relation to highways (Geodata Services
Inc. 2005, p. 2; Waller and Servheen
2005, p. 998); and (4) periodic
workshops discussing implementation
of management actions for wildlife
linkage. The objective of this work is to
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maintain and enhance movement
opportunities for all wildlife species
across the region. Although this linkage
work is not directly associated with the
wolf population, it will benefit wolves
after delisting.
Recognizing there is some uncertainty
concerning the level of genetic exchange
that will occur post-delisting, Wyoming
has agreed to monitor for gene flow and
take adaptive measures, as appropriate,
to achieve a long-term goal of at least
one effective migrant per generation.
Wyoming, in coordination with
Montana and Idaho, intends to collect
genetic samples continuously, and test
the samples every 3 to 5 years to search
for dispersers and their offspring (WGFC
2011, pp. 26–29). Success in achieving
the objective of one effective migrant
per generation will be measured over
multiple generations (WGFC 2011, pp.
26–29). If the desired level of genetic
connectivity is not documented,
Wyoming, in coordination with Idaho
and Montana, will review genetic
monitoring protocols and revise them, if
necessary, to improve the State’s ability
to detect effective migrants (WGFC
2011, pp. 26–29).
Furthermore, population management
will be modified if strategies
implemented by the State of Wyoming
are identified as a meaningful factor that
is preventing the connectivity objective
from being met. In addition, outside
experts will be consulted, as necessary
or appropriate, to assist in identifying
appropriate changes to regional
management. Specifically, Wyoming
will: (1) Conduct an evaluation of all
sources of mortality, in coordination
with other partners as appropriate, with
a focus on those within Wyoming’s
jurisdiction (and the jurisdiction of
other partners, as appropriate), to
determine which sources of mortality,
and the extent to which those sources,
are most meaningfully impacting
genetic connectivity; and (2) modify
population management objectives, in
coordination with other partners, as
appropriate, based on the above
evaluation, as necessary, to achieve the
desired level of gene flow (WGFC 2011,
pp. 26–29). The extent of actions taken
will depend on the level of gene flow as
it relates to the genetic connectivity
objectives. For example, if the data
indicates gene flow is close to the
objective, minor modifications to
management will be implemented
(WGFC 2011, pp. 26–29). However, if
very low levels of gene flow are
documented over numerous
generations, more extreme management
measures will be implemented (WGFC
2011, pp. 26–29). This adaptive
approach will implement specific and
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appropriate remedial actions as directed
by the available data (WGFC 2011, pp.
26–29).
Human-assisted migration will be
used, as necessary, to maintain levels of
genetic exchange and connectivity for
both the GYA (including Wyoming) and
the larger NRM metapopulation (Groan
et al. 2008, p. 2; WGFC 2011, pp. 26–
29). Human intervention in maintaining
recovered populations is necessary for
many conservation-reliant species and a
well-accepted practice in dealing with
population concerns (Scott et al. 2005).
The 1994 wolf reintroduction EIS
indicated that intensive genetic
management might become necessary if
any of the subpopulations developed
genetic or demographic problems
(Service 1994, pp. 6–74). The 1994 EIS
stated that other wildlife management
programs rely upon such agencymanaged genetic exchange, and that the
approach should not be viewed
negatively (Service 1994, pp. 6–75).
Human-assisted genetic exchange is a
proven technique that has created
effective migrants in the NRM DPS. An
example of successful managed genetic
exchange in the NRM population was
the release of 10 wolf pups and
yearlings translocated from
northwestern Montana to YNP in the
spring of 1997. Two of those wolves
became breeders and their genetic
signature is common throughout YNP
and the GYA (vonHoldt et al. 2010, p.
4422). Wolves could easily be moved
again in the highly unlikely event that
inbreeding or other problems ever
threatened wolves in the GYA or any
other area. Agency-managed genetic
exchange could focus on such proven
established methods, or use other novel
means of introducing genes into a
recovery area (e.g., artificial
insemination of wolves). At this time,
such approaches remain unnecessary.
Maintenance of the GYA at very low
population levels is unlikely to be a
meaningful concern in its own right.
Overall, we expect the GYA population
will be managed for a long-term average
of around 300 wolves across portions of
Montana, Idaho, and Wyoming. While
exact numbers are difficult to predict
and may fluctuate by area and by year,
the following information provides
some perspective. In Wyoming, the
State will maintain a population above
100 wolves and 10 breeding pairs on
lands under State jurisdiction and, in
most years, will maintain a population
buffer above this minimum population
level. The wolf population in YNP has
ranged from 96 to 171 wolves since
2000. However, the YNP wolf
population appears to be declining
toward a long-term equilibrium at, or
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slightly below, the lower end of this
range (Service et al. 2000–2010, Table b;
Smith 2010, pers. comm.). In Montana’s
share of the GYA, minimum population
estimates have ranged from 55 to 130
wolves since recovery was achieved in
2002 (Service et al. 2003–2011, Table
1b). During this period, the GYA
constituted between 20 to 42 percent of
Montana’s statewide wolf population
estimate. At the end of 2010, this area
included a minimum population
estimate of 118 wolves. Montana’s
planned quota for this area in the 2011
hunting season is 43 wolves. In Idaho’s
share of the GYA, minimum population
estimates have ranged from 0 to 40
wolves since recovery was achieved in
2002 (Service et al. 2003–2011, Table 2).
At the end of 2010, this area included
a minimum population estimate of 40
wolves. Idaho’s planned 2011 hunt
includes a quota of 30 wolves in this
area (IFGC 2011, entire). Collectively,
these data suggest a long-term average of
around 300 wolves in the GYA,
including sizable populations in YNP,
portions of Wyoming under State
jurisdiction, and portions of the GYA in
Montana and Idaho.
In all but the most extreme cases,
small wolf populations are unlikely to
be threatened solely by the loss of
genetic diversity (Boitani 2003, p. 330).
Review of the scientific literature shows
that, throughout the world, truly
isolated wolf populations that are far
smaller and far less genetically diverse
than the GYA population have persisted
for many decades and even centuries
(Fritts and Carbyn 1995, p. 33; Boitani
2003, pp. 322–23, 330–335; Fuller et al.
2003, pp. 189–190; Liberg 2005, pp. 5–
6; 73 FR 10514, February 27, 2008;
Boitani and Giucci 2010, pp. 19–21). As
with all models, theoretical predictions
rely upon the quality and accuracy of
input data. In most cases, theoretical
predictions of genetic factors impacting
wolf population viability have proven
poor predictors of actual status of very
small wolf populations (Fritts and
Carbyn 1995; Boitani 2003; Fuller et al.
2003, pp. 189–190). For example, a wolf
population on Isle Royale National Park
that started from 2 or 3 founders in 1949
and remained very small (less than 50
wolves, long-term effective population
size 3.8) has persisted until the present
time (Boitani 2003, p. 330) and
maintains comparable demographic
properties to outbred populations of
wolves (Fuller et al. 2003). While some
have speculated that YNP’s small
founder population, maintenance at low
levels, and relative isolation might
eventually affect population dynamics,
this now appears doubtful (Ware 2009,
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abstract; Raikkonen et al. 2010). In the
Kenai Peninsula of Alaska, the wolf
population has remained relatively
stable for the past 30 years despite being
isolated, small (less than 200 wolves),
liberally hunted and trapped, and
exposed to typical wolf diseases and
parasites. The Kenai population is not
threatened (Peterson et al. 1994, p. 1)
and remains genetically fit (Talbot and
Scribner 1997, pp. 20–21). Such
information leads us to believe actual
wolf population persistence in small
isolated situations is a better predictor
of future outcomes than theoretical
models. Regardless, the GYA wolf
population will never be as small or as
isolated as the Kenai population.
The GYA wolf population will not be
threatened by lower genetic diversity in
the foreseeable future because of the
current high level of genetic diversity in
the NRM DPS, proven connectivity
between subpopulations, wolf dispersal
capabilities, the strong tendency of
wolves to outbreed by choosing
unrelated mates, and the likely longterm population and distribution levels
of wolves in the NRM DPS. In addition
to these natural factors, the States of
Montana, Idaho, and Wyoming have
committed to monitor for natural
genetic connectivity, modify
management as necessary to facilitate
natural connectivity, and, if necessary,
implement a human-assisted migration
program to achieve at least one effective
migrant per generation. In fact, in our
professional judgment, even if no new
genes entered into the GYA (a near
impossibility), genetic diversity is likely
many decades, and perhaps a century or
more, away from becoming an issue and
even then, it would be unlikely to
threaten the GYA population.
Poison—Poisoning is a potentially
significant factor in maintenance of the
wolf population as it can be an effective
and inexpensive method to kill wolves.
Wolf extirpation in the United States
and many other areas of the world
occurred primarily through extensive
use of poisons. Wolf populations began
to recover in many areas only when
certain poisons were banned, despite
continued human-caused mortality by
shooting and trapping (Fritts et al. 2003,
p. 311; Fuller et al. 2003, pp. 162–163,
189; Boitani 2003, p. 329). Poison was
once commonly used by Federal and
State agencies and the public
throughout the western United States
for control of coyotes and other
predators. However, many poisons
(such as strychnine, Compound 1080,
cyanide, and other toxins) for predatory
animal management were banned or
their use severely limited (Executive
Order 11643; Fagerstone et al. 2004).
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Today, no poisons can legally be used
against wolves in the United States
because of Environmental Protection
Agency restrictions (described above).
While steps could be taken to allow
registration and limited use, the process
is complex, time consuming (5–10
years), and would likely never allow
widespread use for a host of reasons,
including public disdain for poisoning
predators (Fritts et al. 2003, p. 311;
Fagerstone et al. 2004, p. 76) and
concerns over secondary nontarget
poisoning. Furthermore, within the
WTGMA, poison is prohibited by
Wyoming Statute 23–3–304(a). Sodium
cyanide (only in M–44 devices),
Compound 1080 (sodium fluoroacetate
used only in livestock protection
collars), and denning cartridges (active
ingredients of sodium nitrate and
charcoal) are legal toxicants for use on
other canids. In all three cases,
Environmental Protection Agency label
restrictions preclude use on wolves
(Environmental Protection Agency 1994,
pp. 2, 4; Environmental Protection
Agency 1995, pp. 28–29; Environmental
Protection Agency 2007, p. 3). Poisons
(including strychnine, Compound 1080,
cyanide, and Temic (an agricultural
poison used for insect control)) have
occasionally illegally killed dogs and
wolves in the NRM region. Such illegal
killing has been exceedingly rare and
has not affected the wolf population’s
recovery (Murray et al. 2010, p. 2514;
Service et al. 2011, Table 4, Figure 1).
We believe this source of mortality will
remain rare into the foreseeable future.
We believe that only a concerted
agency-driven or otherwise large-scale
campaign to employ poison could
threaten the recovered wolf population
in Wyoming, the GYA, or the larger
NRM DPS. However, this circumstance
is highly unlikely in the foreseeable
future. Even in unregulated areas like
the predator area, widespread poisoning
is unlikely in the foreseeable future, as
these types of highly toxic and
dangerous poisons would have to be
legally registered and widely available.
Overall, we believe this potential threat
is strictly theoretical in nature and is
unlikely to ever again threaten this wolf
population.
Climate Change—Next to humans,
wolves had the largest natural
distribution of any land mammal in
recent history. Wolves are extremely
adaptable and prey on every type of
ungulate in their worldwide northern
hemisphere range. In North America,
wolves once ranged from central Mexico
to the Arctic Ocean and from coast to
coast. It would be virtually impossible
that environmental, habitat, or prey
species changes due to the
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environmental effects of climate change
could affect such an adaptable, resilient,
and generalist predator.
While there is much debate about the
rates at which carbon dioxide levels,
atmospheric temperatures, and ocean
temperatures will rise, the
Intergovernmental Panel on Climate
Change (IPCC), a group of leading
climate scientists commissioned by the
United Nations, concluded there is a
general consensus among the world’s
best scientists that climate change is
occurring (IPCC 2001, pp. 2–3; IPCC
2007, p. 4). The twentieth century was
the warmest in the last 1,000 years
(Inkley et al. 2004, pp. 2–3), with global
mean surface temperature increasing by
0.4 to 0.8 degrees Celsius (0.7 to 1.4
degrees Fahrenheit). These increases in
temperature were more pronounced
over land masses as evidenced by the
1.5 to 1.7 degrees Celsius (2.7 to 3.0
degrees Fahrenheit) increase in North
America since the 1940s (Vincent et al.
1999, p. 96; Cayan et al. 2001, p. 411).
According to the IPCC, warmer
temperatures will increase 1.1 to 6.4
degrees Celsius (2.0 to 11.5 degrees
Fahrenheit) by 2100 (IPCC 2007, pp. 10–
11).
The magnitude of warming in the
NRM region has been greater, as
indicated by an 8-day advance in the
appearance of spring phenological
indicators in Edmonton, Alberta, since
the 1930s (Cayan et al. 2001, p. 400).
The hydrologic regime in the NRM
region also has changed with global
climate change, and is projected to
change further (Bartlein et al. 1997, p.
786; Cayan et al. 2001, p. 411; Stewart
et al. 2004, pp. 223–224). Under global
climate change scenarios, the NRM
region may eventually experience
milder, wetter winters and warmer,
drier summers (Bartlein et al. 1997, p.
786). Additionally, the pattern of
snowmelt runoff may also change, with
a reduction in spring snowmelt (Cayan
et al. 2001, p. 411) and an earlier peak
(Stewart et al. 2004, pp. 223–224), so
that a lower proportion of the annual
discharge will occur during spring and
summer.
Even with these changes,
environmental, habitat, or prey changes
resulting from climate change should
not threaten the Wyoming wolf
population. Wolves are habitat
generalists, and next to humans are the
most widely distributed land mammal
on earth. Wolves live in every habitat
type in the Northern Hemisphere that
contains ungulates, and once ranged
from central Mexico to the Arctic Ocean
in North America. The NRM region is
roughly in the middle of historic wolf
distribution in North America. Because
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historic evidence suggests gray wolves
and their prey survived in hotter, drier
environments, including some neardesert conditions, we expect wolves
could easily adapt to the warmer and
drier conditions that are predicted with
climate change, including any
northward expansion of diseases,
parasites, new prey, or competitors or
reductions in species currently at or
near the southern extent of their range.
Environmental or habitat changes
resulting from changing climatic
conditions have the potential to impact
wolf prey. Declining moose populations
in the southern GYA may result from
global warming (Service 2008), a
conclusion that has been reached in
other parts of the southern range of
moose in North America. Climate
change has affected elk nutrition, elk
herd demographics, and the proportion
of migratory and nonmigratory elk in
the GYA, but not to the extent that such
wolf prey could disappear (Middleton et
al. 2011, Chapter 1). However, the
extent and rate to which most ungulate
populations will be impacted is difficult
to foresee with any level of confidence.
One logical consequence of climate
change could be a reduction in the
number of elk, deer, moose, and bison
that die overwinter, thus maintaining a
higher prey base for wolves (Wilmers
and Getz 2005, p. 574; Wilmers and Post
2006, p. 405). Furthermore, increased
over-winter survival would likely result
in overall increases and more resiliency
in ungulate populations, thereby
providing more prey for wolves.
Catastrophic Events—Here we
analyze a number of possible
catastrophic events including fire,
volcanic activity, and earthquake. Fire is
a natural part of the Yellowstone
system; however, 20th century forest
management that included extensive
wildfire suppression efforts, promoted
heightened potential for a large fire
event. The 1988 fires, the largest
wildfire in YNP’s recorded history,
burned a total of 3,213 km2 (793,880
acres) or 36 percent of the Park.
However, large mobile species such as
wolves and their ungulate prey usually
are not meaningfully adversely
impacted. Surveys after the 1988 fires
found that 345 dead elk, 36 deer, 12
moose, 6 black bears, and 9 bison died
in GYA as a direct result of the
conflagration (YNP 2011, p. 3). YNP’s
fire management policy (YNP 2004,
entire) indicates natural wildfires
should be allowed to burn, so long as
parameters regarding fire size, weather,
and potential danger are not exceeded.
Those fires that do exceed the
standards, as well as all human-caused
fires, are to be suppressed (YNP 2004,
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entire). Regarding impacts to wolves,
YNP concluded ‘‘wolves are adapted to
landscapes strongly influenced by fire,
the primary forest disturbance agent
within the GYE, are highly vagile, and
are adaptable to changing ecological
conditions * * * [and] fires will
provide significant long-term benefits to
gray wolves by maintaining natural
ecosystem processes’’ (YNP 2004,
Appendix I). Future fires are likely in
the GYA system. Overall, we agree
wolves are adaptable and will benefit
from fires in the long term. Long-term,
wildfires often lead to an increase in
ungulate food supplies and an increase
in ungulate numbers. While minor,
localized, short-term impacts are likely,
fire will not threaten the viability of the
wolf population in either the GYA or
Wyoming.
The GYA has also experienced several
exceedingly large volcanic eruptions in
the past 2.1 million years. The three
super eruptions occurred 2.1 million,
1.3 million, and 640,000 years ago
(Lowenstern et al. 2005, pp. 1–2). Such
a similar event would devastate the
GYA ecosystem. While one could argue
‘‘we are due’’ for such an event,
scientists with the Yellowstone Volcano
Observatory maintain that they ‘‘see no
evidence that another such cataclysmic
eruption will occur at Yellowstone in
the foreseeable future * * * [and that]
recurrence intervals of these events are
neither regular nor predictable’’
(Lowenstern et al. 2005, p. 6). We share
this view and do not consider such an
event likely within the foreseeable
future.
More likely to occur is a nonexplosive
lava flow eruption or a hydrothermalexplosion. There have been 30
nonexplosive lava flows in YNP over
the last 640,000 years, most recently
70,000 years ago (Lowenstern et al.
2005, p. 2). During such an eruption,
flows ooze slowly over the surface,
moving a few hundred feet per day for
several months to several years
(Lowenstern et al. 2005, p. 2). Any
renewed volcanic activity at YNP would
most likely take this form (Lowenstern
et al. 2005, p. 3). In general, such events
would have localized impacts and be far
less devastating than a large eruption
(although such an event could also
cause fires; fire as a threat is discussed
above). Hydrothermal explosions,
triggered by sudden changes in pressure
of the hydrothermal system, also
occasionally impact the region. More
than a dozen large hydrothermalexplosion craters formed between about
14,000 and 3,000 years ago (Lowenstern
et al. 2005, p. 4). The largest
hydrothermal-explosion crater
documented in the world is along the
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north edge of Yellowstone Lake in an
embayment known as Mary Bay; this
2.6-km (1.5-mile) diameter crater formed
about 13,800 years ago (Lowenstern et
al. 2005, p. 4). We do not consider either
a nonexplosive lava flow eruption or a
hydrothermal-explosion likely within
the foreseeable future, but even if one of
these did occur, the impact to wolves or
their prey would likely be localized,
temporary, and would not threaten the
viability of the wolf population in either
the GYA or Wyoming.
Earthquakes also occur in the region.
The most notable earthquake in YNP’s
recent history was a magnitude 7.5 in
1959 (Lowenstern et al. 2005, p. 3).
Similarly, a magnitude 6.5 earthquake
hit within YNP in 1975 (Lowenstern et
al. 2005, p. 3). The 1959 earthquake
killed 28 people, most of them in a
massive landslide triggered by the quake
(Lowenstern et al. 2005, p. 3). Such
massive landslides and other
earthquake-related impacts could also
affect wildlife. But as with other
potential catastrophic events, the impact
of a large earthquake to wolves or prey
would likely be localized, temporary,
and would not threaten the viability of
the wolf population in either the GYA
or Wyoming.
The habitat model/population
viability analysis by Carroll et al. (2003,
p. 543) analyzed environmental
stochasticity and predicted it was
unlikely to threaten wolf persistence in
the GYA. We also considered
catastrophic and stochastic events that
might reasonably occur in the State of
Wyoming, the GYA, or the NRM DPS
within the foreseeable future, to the
extent possible. Most catastrophic
events discussed above are unlikely to
occur within the foreseeable future.
Other events that might occur within
the foreseeable future would likely
cause only localized and temporary
impacts that would not threaten the
viability of the wolf population in either
the GYA or Wyoming.
Impacts to Wolf Pack Social Structure
as a Result of Human-caused
Mortality—When human-caused
mortality rates are low, packs contain
older individuals. Such larger complex
pack structures are most common in
National Parks and large, remote
wilderness areas. These types of social
structures will continue unaltered in
those areas after wolves are delisted. In
2010, approximately 20 percent of the
estimated 1,651 wolves in the NRM DPS
lived primarily in National Parks or
Wilderness areas. However, wolves in
much of the NRM DPS constantly
interact with livestock and people. In
these areas, wolves experience higher
rates of human-caused mortality, which
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alters pack structure but does not reduce
population viability or their ability to
reproduce (Brainerd et al. 2008, p. 89)
or produce dispersers (Jimenez et al.
2011, p. 1).
Wolf packs frequently have high rates
of natural turnover (Mech 2007, p. 1482)
and quickly adapt to changes in pack
social structure (Brainerd et al. 2008, p.
89). Higher rates of human-caused
mortality outside protected areas will
result in different wolf pack size and
structure than in protected areas.
However, wolf populations in many
parts of the world, including most of
North America, experience various
levels of human-caused mortality and
the associated disruption in natural
processes and wolf social structure,
without ever being threatened (Boitani
2003, pp. 322–323). Therefore, while
human-caused mortality may alter pack
structure, we have no evidence that
indicates this issue is a significant
concern for wolf conservation.
Since 1987, we have removed more
than 1,000 problem wolves in the NRM
region and have monitored the effect of
removing breeding adults and other
pack members on wolf pack structure
and subsequent breeding. Those effects
were minor and would certainly not
affect wolf population recovery
(Brainerd et al. 2008, p. 89). Although
defense of property laws in Wyoming
are similar to current nonessential
experimental regulations, humancaused mortality may increase slightly
after delisting. In addition, regulated
hunting will be allowed, which will
increase wolf mortality rates. History
has proven that adequate wolf
reproduction and survival can occur to
sustain wolf populations, despite
prolonged periods of high rates of
human-caused mortality (Bointani 2003,
pp. 322–323). The Wyoming wolf
population will be managed so that
human-caused mortality will not
threaten the population.
Conclusion (Including Cumulative
Impacts)
According to 50 CFR 424.11(d), we
may delist a species if the best available
scientific and commercial data indicate
that: (1) The species is extinct; (2) the
species is recovered and is no longer
endangered or threatened; or (3) if the
original scientific data used at the time
the species was classified were in error.
The second criterion (i.e., the species
has recovered and is no longer
endangered or threatened) applies for
wolves in Wyoming.
Wolves in Wyoming and across the
NRM DPS are recovered. All prongs of
the recovery criteria are satisfied. The
numeric and distributional components
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of the overarching recovery goal have
been exceeded for 11 consecutive years.
Furthermore, Montana, Idaho, and
Wyoming have each individually met or
exceeded the minimum per-State
recovery targets every year since at least
2002, and met or exceeded the stepdown management goals every year
since at least 2004. Each of the recovery
areas (which were originally used to
measure progress towards recovery) has
been documented at or above 10
breeding pairs and 100 wolves every
year since 2005 (and probably exceeded
these levels every year since 2002)
(Service et al. 2011, Table 4). Finally,
the available evidence demonstrates the
NRM gray wolf population is
functioning as a metapopulation with
gene flow between subpopulations.
Thus, we consider the population
recovered.
Still, however, before we can delist,
we must consider the threats currently
facing the species and the threats that
are reasonably likely to affect the
species in the foreseeable future
following the delisting. Under section 3
of the Act, a species is ‘‘endangered’’ if
it is in danger of extinction throughout
all or a significant portion of its range
and is ‘‘threatened’’ if it is likely to
become endangered within the
foreseeable future throughout all or a
significant portion of its range. In
considering what factors might
constitute ‘‘threats,’’ we must look
beyond the exposure of the species to a
particular factor to evaluate whether the
species may respond to the factor in a
way that causes actual impacts to the
species. The information must include
evidence sufficient to suggest that the
potential threat is likely to materialize
and that it has the capacity (i.e., it
should be of sufficient magnitude and
extent) to affect the species’ status such
that it meets the definition of
endangered or threatened under the Act.
Most of the factors evaluated above in
the ‘‘Summary of Factors Affecting the
Species’’ are not expected to
meaningfully impact the wolf
population in Wyoming, the GYA, or
the NRM region. As long as populations
are maintained above minimal recovery
levels, wolf biology (namely the species’
reproductive capacity) and the
availability of large, secure blocks of
suitable habitat will maintain strong
source populations capable of
withstanding all other foreseeable
threats. In terms of habitat, the amount
and distribution of suitable habitat in
public ownership provides, and will
continue to provide, large core areas
that contain high-quality habitat of
sufficient size to anchor a recovered
wolf population. Our analysis of land-
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use practices shows these areas will
maintain their suitability well into the
foreseeable future. While disease and
parasites can temporarily impact
population stability, as long as
populations are managed above
recovery levels, these factors are not
likely to threaten the wolf population at
any point in the foreseeable future.
Natural predation is also likely to
remain an insignificant factor in
population dynamics into the
foreseeable future. Additionally, we
conclude that other natural or manmade
factors like public attitudes towards
wolves, climate change, catastrophic
events, and impacts to wolf pack social
structure are unlikely to threaten the
wolf population within the foreseeable
future. While poisoning is a potentially
significant factor in the maintenance of
the wolf population, no poisons can be
legally used to poison wolves in the
United States and we do not foresee or
anticipate a change in poison regulation
that would allow more widespread wolf
poisoning.
Human-caused mortality is the most
significant issue to the long-term
conservation status of the wolf
population in Wyoming, the GYA, and
the entire NRM DPS. Therefore,
managing this source of mortality (i.e.,
overutilization for commercial and
recreational purposes as well as humancaused predation) remains the primary
challenge to maintaining a recovered
wolf population into the foreseeable
future. Fortunately, wolf populations
have an ample natural resiliency to high
levels of human-caused mortality, if
population levels and controllable
sources of mortality are adequately
regulated. For example, in 2009, more
than 600 NRM wolves died from all
sources of mortality (agency control
including defense of property, regulated
harvest, illegal and accidental killing,
and natural causes), and the population
still grew by almost 5 percent. From
1995 to 2008, the NRM wolf population
grew by an average of about 20 percent
annually, even in the face of an average
annual human-caused mortality rate of
23 percent (Smith et al. 2010, p. 620).
Overall, wolf populations can maintain
themselves despite sustained humancaused mortality rates of 22 to greater
than 50 percent (Keith 1983; Ballard et
al. 1987; Fuller 1989; Fuller et al. 2003,
pp. 182–184; Creel and Rotella 2010).
Mortality rates and population growth
rates reported from 2007 to 2010
indicate that the wolf population in
Wyoming outside YNP can sustain, on
average, a 36 percent mortality rate from
human causes (WGFC 2011, p. 12).
Furthermore, after severe declines, wolf
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populations can more than double in
just 2 years if mortality is reduced; in
the NRM DPS, increases of nearly 100
percent per year have been documented
in low-density suitable habitat (Fuller et
al. 2003, pp. 181–183; Service et al.
2011, Table 4).
Human-caused mortality can include
both controllable sources and sources of
mortality that will be difficult to limit.
Controllable sources of mortality are
discretionary and can be limited by the
managing agency. They include
permitted take in chronic depredating
areas, sport hunting, and agency action
to address impacts to ungulates. Sources
of mortality that will be difficult to
limit, or may be uncontrollable, occur
regardless of population levels and
include things like defense of property
mortality, illegal take, accidental
mortality (such as vehicle collisions),
and mortality in the predator area of
Wyoming.
The original recovery goal called for
a three-part metapopulation of at least
30 breeding pairs and at least 300
wolves equitably distributed between
Montana, Idaho, and Wyoming. We
have determined that Wyoming’s share
of this recovery goal will be satisfied by
Wyoming’s commitment to maintain at
least 10 breeding pairs and at least 100
wolves in areas primarily within the
State’s jurisdiction. All sources of
mortality will be considered in
management decisions to ensure the
management objectives are met.
Furthermore, Wyoming intends to
maintain an adequate buffer above
minimum population objectives to
accommodate management needs and
ensure uncontrollable sources of
mortality do not drop the population
below this minimum population level.
Thus, in most years, the minimum
recovery goal for the State of Wyoming
will be exceeded in areas under
Wyoming’s jurisdiction alone, allowing
YNP and the Wind River Indian
Reservation to provide an additional
buffer above the minimum recovery
target. Additionally, Wyoming is
planning a gradual population reduction
to ensure population targets are not
compromised while the State gathers
information on the vulnerability of
wolves under a State management
regime. This graduated approach to
population reductions and long-term
stabilization of the population, with an
adequate buffer above minimum
population targets, provides us with
confidence that the population in areas
under State jurisdiction will be
maintained at-or-above 10 breeding
pairs, and at-or-above 100 wolves.
All three States within the NRM DPS
are required to manage comfortably
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above the minimum recovery level of at
least 10 breeding pairs and at least 100
wolves. In Montana and Idaho, we
required the Statewide population level
to be managed at least 50 percent above
this target. Because Wyoming, unlike
Montana and Idaho, has a large portion
of its wolf population in areas outside
the State’s control (e.g., YNP and the
Wind River Indian Reservation), we
developed an alternative approach to
achieve the desired safety margin above
the minimum recovery goal.
Specifically, the wolf populations in
YNP and the Wind River Indian
Reservation will provide the remaining
buffer above the minimum recovery goal
intended by the step-down management
objective employed in Montana and
Idaho (i.e., population targets 50 percent
above minimum recovery levels). From
2001 to the end of 2010, the wolf
population in YNP ranged from 96 to
171 wolves, and between 6 to 16
breeding pairs, with an average of 9.8
breeding pairs. However, recent
population levels may be higher than
the long-term carrying capacity of YNP,
as the park predicts their wolf numbers
may decline further and settle into a
lower equilibrium long term (Smith
2010, pers. comm.). Regardless, YNP
will always represent a large core
refugium that contains a substantial
number of overwintering wild ungulates
and few livestock with low levels of
human-caused mortality. These factors
guarantee that the area will remain a
secure stronghold for the Wyoming wolf
population. Thus, YNP will always
provide a large, secure wolf population
providing a safety margin above the
minimum recovery goal.
The Wind River Indian Reservation
will further buffer the population,
although the area’s contribution to
recovery levels has always been, and is
likely to remain, very modest. The Wind
River Indian Reservation typically
contains a small number of wolves
(single digits), which sometimes form
packs that count toward Tribal
population totals. None of these packs
have ever met the breeding pair
definition.
In total, Wyoming wolves will be
permanently managed as game animals
or protected (e.g., in National Parks) in
about 40,000 km2 (15,400 mi2) in the
northwestern portion of the State (15.7
percent of Wyoming), including YNP,
Grand Teton National Park, John D.
Rockefeller Memorial Parkway, adjacent
U.S. Forest Service-designated
Wilderness Areas, adjacent public and
private lands, the National Elk Refuge,
and the Wind River Indian Reservation
(Lickfett 2011, in litt.). This area (see
Figure 1) includes: 100 percent of the
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portion of the GYA recovery area within
Wyoming (Service 1987, Figure 2);
approximately 79 percent of the
Wyoming portion of the primary
analysis area that the 1994
reintroduction EIS focused on (Service
1994, Figure 1.1); the entire home range
for 24 of 27 breeding pairs in Wyoming
and 24 of 34 packs in the State (Service
et al. 2011, Figure 3); and approximately
76 percent of the State’s suitable habitat
(including 81 percent of the high-quality
habitat (greater than 0.8) and 62 percent
of the medium-high-quality habitat (0.5–
0.799) (Oakleaf 2011, in litt.)). Although
wolves will not persist in the predator
area, these protected and managed
portions of Wyoming are of sufficient
size to support a recovered wolf
population in Wyoming.
Genetic diversity is not a wolf
conservation issue in the NRM DPS at
this time because the NRM wolves are
as genetically diverse as the vast, secure,
healthy, contiguous, and connected
populations in Canada. However, the
GYA is the most isolated core recovery
area within the NRM DPS. Thus, the
States have agreed to monitor for natural
genetic connectivity, modify
management as necessary to facilitate
natural connectivity, and, if necessary,
implement a human-assisted migration
program to achieve at least one effective
migrant per generation. These factors,
and wolves’ natural dispersal and
reproductive capacity, ensures the GYA
wolf population will not be threatened
by low genetic diversity in the
foreseeable future.
Further buffering the genetic and
general health of the GYA population is
the fact that we expect the GYA
population will be managed for a longterm average of around 300 wolves
across portions of Montana, Idaho, and
Wyoming. This total will be subdivided
across the GYA, including sizable
populations in YNP, portions of
Wyoming under State jurisdiction, and
portions of the GYA in Montana and
Idaho. This added representation,
resiliency, and redundancy across the
entire GYA provides further assurance
that this wolf population will not
become threatened again within the
foreseeable future.
We considered all potential threats,
including all sources of mortality,
currently facing the species and those
reasonably likely to affect the species in
the foreseeable future throughout
Wyoming and the GYA. Collectively,
the available information indicates that
the Wyoming wolf population, in
addition to the GYA wolf population, is
recovered, is likely to remain recovered,
and is unlikely to again become
threatened with extinction within the
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foreseeable future. Thus, in accordance
with 50 CFR 424.11(d), we propose to
delist wolves in Wyoming. This
rulemaking is separate and independent
from, but additive to, the previous
action delisting of wolves in the
remainder of the NRM DPS (all of Idaho,
all of Montana, eastern Oregon, eastern
Washington, and north-central Utah) (74
FR 15123, April 2, 2009; 76 FR 25590,
May 5, 2011).
This proposed rule is premised on
agreed upon and anticipated changes to
Wyoming State law and WGFC
regulations necessary to implement the
Wyoming wolf management plan. We
expect these statutory and regulatory
changes will be made within the next
several months. Depending on the exact
nature of the changes, we may need to
reopen the comment period to provide
the public an opportunity to review and
comment once these changes are
finalized. Should Wyoming fail to make
the changes necessary to support a
recovered wolf population, delisting
will not occur and this proposal will be
withdrawn.
Post-Delisting Monitoring
Section 4(g)(1) of the Act requires us
to implement a system in cooperation
with the States, to monitor for at least
5 years the status of all species that have
recovered and been removed from the
Lists of Endangered and Threatened
Wildlife and Plants (50 CFR 17.11 and
17.12). The primary goal of postdelisting monitoring is to ensure that
the recovered species does not
deteriorate, and if an unanticipated
decline is detected, to take measures to
halt the decline to avoid relisting the
species as threatened or endangered. If
relisting is ever warranted, as directed
by section 4(g)(2) of the Act, we will
make prompt use of the Act’s emergency
listing provisions if we determine the
wolf faces a significant risk to its wellbeing.
Wolves have been monitored in the
NRM DPS for over 20 years. The NRM
region was intensively monitored for
wolves even before wolves were
documented in Montana in the mid1980s (Weaver 1978; Ream and Mattson
1982, pp. 379–381; Kaminski and
Hansen 1984, p. v). Numerous Federal,
State, and Tribal agencies, universities,
and special interest groups assisted in
those various efforts. Since 1979, wolves
have been monitored using standard
techniques including collecting,
evaluating, and following up on
suspected observations of wolves or
wolf signs by natural resource agencies
or the public; howling or snow tracking
surveys conducted by the Service,
cooperators, volunteers, and interested
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special interest groups; and by
capturing, radio-collaring, and
monitoring wolves. We only consider
wolves and wolf packs as confirmed
when Federal, State, or Tribal agency
verification is made by field staff that
can reliably identify wolves and wolf
signs.
At the end of the year, we compile
agency-confirmed wolf observations to
estimate the number and location of
adult wolves and pups that were likely
alive on December 31 of that year. These
data are then summarized by packs to
indicate overall population size,
composition, and distribution. This
level of wildlife monitoring is intensive
and provides relatively accurate
estimates of wolf population
distribution and structure (Service et al.
2011, Table 1–4, Figure 1–4). The
USFWS Annual Reports have
documented all aspects of the wolf
management program including staffing
and funding, legal issues, population
monitoring, control to reduce livestock
and pet damage, research (predator-prey
interactions, livestock/wolf conflict
prevention, disease and health
monitoring, publications, etc.) and
public outreach.
Post-delisting, Wyoming will likewise
monitor and report on wolf populations.
The WGFD will monitor breeding pairs
and total number of wolves in Wyoming
in order to document their number,
distribution, reproduction, and
mortality (WGFC 2011, pp. 17–21). The
WGFD will be responsible for
monitoring these parameters in areas
under State jurisdiction. The Shoshone
and Arapahoe Tribal Fish and Game
Department and the Service’s Lander
Fish and Wildlife Conservation Office
will continue to monitor wolves on the
Wind River Indian Reservation; the
National Park Service will continue to
monitor wolves inside YNP and Grand
Teton National Park; and the Service
will continue to monitor wolves on the
National Elk Refuge (Shoshone and
Arapahoe Tribal Fish and Game
Department 2007, p. 9; WGFC 2011, pp.
17–21). These agencies have agreed to
share information regarding the status of
wolves within their respective
jurisdictions in Wyoming (WGFC 2011,
pp. 17–21). These agencies will
continue to use the monitoring
techniques and strategies that have been
used to estimate the NRM wolf
population for more than 20 years. We
fully recognize and anticipate that
monitoring techniques may change
through time as new knowledge
becomes available and as the parties
responsible for monitoring gain
additional experience at wolf
management and conservation. For
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example, we anticipate parties
responsible for monitoring may use
other survey methods and data that are
biologically equivalent to the breeding
pair definition (Mitchell et al. 2008,
entire). Information from the Service,
the National Park Service, the Wind
River Indian Reservation, and the State
of Wyoming will be published by WGFD
in an annual wolf report. Similar reports
have been published annually since
1989 by the Service and our partners
(Service et al. 1989–2008).
For the post-delisting monitoring
period, the best source of that
information will be the State’s annual
report or other wolf reports and
publications. We intend to post those
annual State wolf reports on our Web
site (https://www.fws.gov/mountainprairie/species/mammals/wolf/) by
approximately April 1 of each following
year. We also intend to annually publish
an assessment of the status of the wolf
population in the NRM DPS during the
post-delisting monitoring period. This
assessment will consider the numbers of
packs, breeding pairs, and total numbers
of wolves in mid-winter by State and by
recovery area as well as any changes in
threats. This information will inform
whether a formal status review is
necessary.
Specifically, the following scenarios
will lead us to initiate a formal status
review to determine if relisting is
warranted:
(1) If the wolf population falls below
the minimum recovery level of 10
breeding pairs and 100 wolves in
Wyoming statewide (including YNP and
the Wind River Indian Reservation) at
the end of any one year;
(2) If the wolf population segment in
Wyoming in areas under the State’s
jurisdiction (i.e., excluding YNP and the
Wind River Indian Reservation) falls
below 10 breeding pairs or 100 wolves
at the end of the year for 3 consecutive
years;
(3) If the wolf population in Wyoming
falls below 15 breeding pairs or 150
wolves, including YNP and the Wind
River Indian Reservation, for 3
consecutive years; or
(4) If a change in State law or
management objectives would
significantly increase the threat to the
wolf population.
Status review or relisting decisions
will be based on the best scientific and
commercial data available. If a formal
status review is triggered during the
post-delisting monitoring period by
these triggers or the triggers noted for
the remainder of the DPS in our 2009
delisting rule (74 FR 15123, April 2,
2009), the review will evaluate the
status of the entire NRM DPS to
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determine if relisting is warranted. In
the unlikely event such a review is ever
necessary, the review would attempt to
identify why a particular area is not
meeting its population objectives. For
example, if the wolf population in
Wyoming falls below 15 breeding pairs
or 150 wolves including YNP and the
Wind River Indian Reservation for 3
consecutive years when the Wyoming
wolf population under State jurisdiction
is at least 10 breeding pairs and 100
wolves, the status review would focus
on factors impacting wolves in YNP and
the Wind River Indian Reservation.
Adaptive management strategies may be
recommended in this review, but
Wyoming would not be required to
contribute more than 10 breeding pairs
and 100 wolves outside YNP and the
Wind River Indian Reservation.
All such reviews will be made
available for public review and
comment, including peer review by
select species experts. If relisting is ever
warranted, as directed by section 4(g)(2)
of the Act, we will make prompt use of
the Act’s emergency listing provisions if
necessary to prevent a significant risk to
the well-being of the NRM DPS.
Additionally, if any of these scenarios
occur during the mandatory postdelisting monitoring period of at least 5years, the post-delisting monitoring
period will be extended 5 additional
years from that point.
Effects of the Proposed Rule
This proposal, if made final, would
remove the protections of the Act for all
gray wolves in Wyoming. This
rulemaking is separate and independent
from, but additive to, the previous
action delisting wolves in the remainder
of the NRM DPS (all of Idaho, all of
Montana, eastern Oregon, eastern
Washington, and north-central Utah) (74
FR 15123, April 2, 2009; 76 FR 25590,
May 5, 2011). Additionally, this
proposal, if made final, would remove
the special regulations under section
10(j) of the Act designating Wyoming as
a nonessential experimental population
area for gray wolves. These regulations
currently are found at 50 CFR 17.84(i)
and 17.84(n).
The Service is also proposing actions
for wolves in the eastern United States
that are separate from this proposed
rulemaking. For more information on
those actions, please see our Federal
Register publications of May 5, 2011 (76
FR 26086) and August 26, 2011 (76 FR
53379). Both today’s proposed rule and
the eastern United States proposed rule
would, if finalized, amend the listing for
‘‘Wolf, gray’’ under ‘‘MAMMALS’’ in
the List of Endangered and Threatened
Wildlife. The remaining protections of
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the gray wolf under the Act do not
extend to gray wolf-dog hybrids.
Required Determinations
Clarity of the Rule
We are required by Executive Orders
12866 and 12988 and by the
Presidential Memorandum of June 1,
1998, to write all rules in plain
language. This means that each rule we
publish must: (1) Be logically organized;
(2) Use the active voice to address
readers directly; (3) Use clear language
rather than jargon; (4) Be divided into
short sections and sentences; and (5)
Use lists and tables wherever possible.
If you feel that we have not met these
requirements, send us comments by one
of the methods listed in ADDRESSES. To
better help us revise the proposed rule,
your comments should be as specific as
possible. For example, you should tell
us the specific sections or paragraphs
that are unclearly written, which
sections or sentences are too long, the
sections where you feel lists or tables
would be useful, etc.
Paperwork Reduction Act
The OMB regulations at 5 CFR part
1320 implement provisions of the
Paperwork Reduction Act (44 U.S.C.
3501 et seq.). The OMB regulations at 5
CFR 1320.3(c) define a collection of
information as the obtaining of
information by or for an agency by
means of identical questions posed to,
or identical reporting, recordkeeping, or
disclosure requirements imposed on, 10
or more persons. Furthermore, 5 CFR
1320.3(c)(4) specifies that ‘‘ten or more
persons’’ refers to the persons to whom
a collection of information is addressed
by the agency within any 12-month
period. For purposes of this definition,
employees of the Federal Government
are not included. We may not conduct
or sponsor and you are not required to
respond to, a collection of information
unless it displays a currently valid OMB
control number.
This rule does not contain any
collections of information that require
approval by OMB under the Paperwork
Reduction Act. As proposed under the
Post-Delisting Monitoring section above,
gray wolves in Wyoming will be
monitored by Wyoming Game and Fish
Department, Sovereign Tribal Nations in
Wyoming, the National Park Service,
and the Service. We do not anticipate a
need to request data or other
information from 10 or more persons
during any 12-month period to satisfy
monitoring information needs. If it
becomes necessary to collect
information from 10 or more nonFederal individuals, groups, or
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organizations per year, we will first
obtain information collection approval
from the OMB.
National Environmental Policy Act
We have determined that an
Environmental Assessment or an
Environmental Impact Statement, as
defined under the authority of the NEPA
of 1969, need not be prepared in
connection with regulations adopted
pursuant to section 4(a) of the Act. We
published a notice outlining our reasons
for this determination in the Federal
Register on October 25, 1983 (48 FR
49244).
Executive Order 13211
Executive Order 13211 requires
agencies to prepare Statements of
Energy Effects when undertaking certain
actions. As this rule is not expected to
significantly affect energy supplies,
distribution, or use, this action is not a
significant energy action and no
Statement of Energy Effects is required.
jlentini on DSK4TPTVN1PROD with PROPOSALS2
Government-to-Government
Relationship With Tribes
In accordance with the President’s
memorandum of April 29, 1994,
Government-to-Government Relations
with Native American Tribal
Governments (59 FR 22951), Executive
Order 13175, and 512 DM 2, we intend
to coordinate this rulemaking with the
affected Tribes (Eastern Shoshone and
Northern Arapahoe Tribes). We will
endeavor to consult with Native
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American tribes and Native American
organizations in order to both (1)
Provide them with a complete
understanding of the proposed changes,
and (2) understand their concerns with
those changes. We intend to fully
consider their comments during the
development of a final rule. If requested,
we will conduct additional
consultations with Native American
tribes and multitribal organizations
subsequent to a final rule in order to
facilitate the transition to State and
tribal management of gray wolves
within Wyoming.
Authority: 16 U.S.C. 1361–1407; 16 U.S.C.
1531–1544; 16 U.S.C. 4201–4245; Pub. L. 99–
625, 100 Stat. 3500; unless otherwise noted.
References Cited
§ 17.11
A complete list of references cited is
available: (1) On the Internet at https://
www.regulations.gov or https://
www.fws.gov/mountain-prairie/species/
mammals/wolf/ or (2) upon request
from the Denver Regional Office,
Ecological Services Office (see FOR
FURTHER INFORMATION CONTACT above).
2. Amend § 17.11(h) by revising the
entries for ‘‘Wolf, gray’’ under
MAMMALS in the List of Endangered
and Threatened Wildlife as follows:
a. Remove the words ‘‘TX, and WY’’
from the first entry and add in their
place the words ‘‘and TX’’; and
b. Remove the last entry, ‘‘Wolf, gray
[Northern Rocky Mountain DPS],’’ in its
entirety.
Authority
The authority for this action is the
Endangered Species Act of 1973, as
amended (16 U.S.C. 1531 et seq.).
List of Subjects in 50 CFR Part 17
Endangered and threatened species,
Exports, Imports, Reporting and
recordkeeping requirements,
Transportation.
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Proposed Regulation Promulgation
Accordingly, we propose to further
amend part 17, subchapter B of chapter
I, title 50 of the Code of Federal
Regulations, as proposed to be amended
at 76 FR 53379, August 26, 2011, as
follows:
PART 17—ENDANGERED AND
THREATENED WILDLIFE AND PLANTS
1. The authority citation for part 17
continues to read as follows:
§ 17.84
[Amended]
[Amended]
3. Amend § 17.84 by removing and
reserving both paragraphs pertaining to
‘‘Gray wolf (Canis lupus)’’: (i) and (n).
Dated: September 23, 2011.
Daniel M. Ashe,
Director, U.S. Fish and Wildlife Service.
[FR Doc. 2011–25359 Filed 10–4–11; 8:45 am]
BILLING CODE 4310–55–P
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[Federal Register Volume 76, Number 193 (Wednesday, October 5, 2011)]
[Proposed Rules]
[Pages 61782-61823]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-25359]
[[Page 61781]]
Vol. 76
Wednesday,
No. 193
October 5, 2011
Part II
Department of the Interior
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Fish and Wildlife Service
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50 CFR Part 17
Endangered and Threatened Wildlife and Plants; Removal of the Gray
Wolf in Wyoming From the Federal List of Endangered and Threatened
Wildlife and Removal of the Wyoming Wolf Population's Status as an
Experimental Population; Proposed Rule
Federal Register / Vol. 76, No. 193 / Wednesday, October 5, 2011 /
Proposed Rules
[[Page 61782]]
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DEPARTMENT OF THE INTERIOR
Fish and Wildlife Service
50 CFR Part 17
[Docket No. FWS-R6-ES-2011-0039; 92220-1113-0000-C6]
RIN 1018-AX94
Endangered and Threatened Wildlife and Plants; Removal of the
Gray Wolf in Wyoming From the Federal List of Endangered and Threatened
Wildlife and Removal of the Wyoming Wolf Population's Status as an
Experimental Population
AGENCY: U.S. Fish and Wildlife Service, Interior.
ACTION: Proposed rule; notice of a public hearing.
-----------------------------------------------------------------------
SUMMARY: We, the U.S. Fish and Wildlife Service (Service or USFWS), are
proposing to remove the gray wolf (Canis lupus) in Wyoming from the
List of Endangered and Threatened Wildlife. This rule focuses on the
Wyoming portion of the Northern Rocky Mountain (NRM) Distinct
Population Segment (DPS), except where discussion of the larger Greater
Yellowstone Area (GYA) or NRM metapopulation (a population that exists
as partially isolated sets of subpopulations) is necessary to
understand impacts to wolves in Wyoming. The best scientific and
commercial data available indicate that wolves in Wyoming are recovered
and no longer meet the definition of endangered or threatened under the
Endangered Species Act of 1973, as amended (Act). Wyoming's wolf
population is stable, threats are addressed, and a post-delisting
monitoring and management framework has been developed. However,
additional changes to Wyoming State law and Wyoming Game and Fish
Commission regulations are necessary for implementation. We expect the
State of Wyoming to adopt the necessary statutory and regulatory
changes within the next several months. If this proposal is finalized,
the gray wolf would be delisted in Wyoming, the nonessential
experimental population designation would be removed, and future
management for this species, except in National Parks and National
Wildlife Refuges, would be conducted by the appropriate State or Tribal
wildlife agencies. We seek information, data, and comments from the
public about this proposal including the post-delisting monitoring and
management framework.
DATES: Public Comments: We will accept comments received or postmarked
on or before January 13, 2012. Please note that if you are using the
Federal eRulemaking Portal (see ADDRESSES), the deadline for submitting
an electronic comment is 11:59 p.m. Eastern Daylight Time on this date.
Public Hearing: We will hold a public hearing on this proposed rule
on November 15, 2011, as well as an informational open house
immediately preceding the public hearing. For more information, see
``Public Hearing and Open House'' in SUPPLEMENTARY INFORMATION.
ADDRESSES: You may submit comments by one of the following methods:
(1) Electronically: Go to the Federal eRulemaking Portal: https://www.regulations.gov. In the Enter Keyword or ID box, enter FWS-R6-ES-
2011-0039, which is the docket number for this rulemaking. Then, in the
Search panel at the top of the screen, under the Document Type heading,
check the box next to Proposed Rules to locate this document. You may
submit a comment by clicking on ``Submit a Comment.''
(2) By hard copy: Submit by U.S. mail or hand-delivery to: Public
Comments Processing, Attn: FWS-R6-ES-2011-0039, Division of Policy and
Directives Management, U.S. Fish and Wildlife Service, 4401 N. Fairfax
Drive, MS 2042-PDM, Arlington, VA 22203.
We will post all comments on https://www.regulations.gov. This
generally means that we will post any personal information you provide
us (see ``Public Comments'' in SUPPLEMENTARY INFORMATION for more
information).
FOR FURTHER INFORMATION CONTACT: For information on wolves in the
northern Rocky Mountains see https://www.fws.gov/mountain-prairie/species/mammals/wolf/, or contact U.S. Fish and Wildlife Service,
Mountain-Prairie Region Office, Ecological Services Division, 134 Union
Blvd., Lakewood, CO 80228; telephone 303-236-7400. Persons who use a
telecommunications device for the deaf (TDD) may call the Federal
Information Relay Service (FIRS) at 800-877-8339.
SUPPLEMENTARY INFORMATION:
Public Comments
We intend that any final action resulting from this proposed rule
will be based on the best scientific and commercial data available and
be as accurate and as effective as possible. Therefore, we request
comments or information from other concerned government agencies, the
scientific community, industry, or any other interested party
concerning this proposed rule. Specifically, we request information on
the following questions:
(1) Is our description and analysis of the biology, population, and
distribution accurate?
(2) Does the proposed rule provide accurate and adequate review and
analysis of the factors relating to the threats?
(3) Are the conclusions we reach, including their projection of
maintenance of a viable population, logical and supported by the
evidence provided?
(4) Did we include all the necessary and pertinent literature to
support our assumptions, arguments, and conclusions?
(5) Is it reasonable for us to conclude that Wyoming's approach to
wolf management is likely to maintain Wyoming's wolf population above
recovery levels?
(6) Is it reasonable for us to conclude that Wyoming's approach to
wolf management is likely to provide for sufficient levels of gene flow
(either natural or human assisted) to prevent genetic problems from
negatively impacting the GYA's population or the larger NRM
metapopulation in a manner that would meaningfully impact viability?
You may submit your comments and materials concerning this proposed
rule by one of the methods listed in ADDRESSES. We will not accept
comments sent by e-mail or fax or to an address not listed in
ADDRESSES. If you submit a comment via https://www.regulations.gov, your
entire comment--including your personal identifying information--will
be posted on the Web site. If you submit a hardcopy comment that
includes personal identifying information, you may request at the top
of your document that we withhold this information from public review.
However, we cannot guarantee that we will be able to do so. We will
post all hardcopy comments on https://www.regulations.gov.
Comments and materials we receive, as well as supporting
documentation we used in preparing this proposed rule, will be
available for public inspection on https://www.regulations.gov, or by
appointment, during normal business hours, at the Mountain-Prairie
Region Office (see FOR FURTHER INFORMATION CONTACT).
Public Hearing and Open House
Section 4(b)(5)(E) of the Act requires that we hold one public
hearing on the proposal, if requested. In anticipation of such a
request, we have scheduled an informational meeting (a brief
presentation about the proposed rule
[[Page 61783]]
with a question-and-answer period) from 4:30 p.m. to 6 p.m., and a
public hearing from 6:30 p.m. to 8:30 p.m., on November 15, 2011, at
the Robert A. Peck Arts Center, Central Wyoming College, 2660 Peck
Avenue, Riverton, WY 82501; 307-855-2000.
Anyone wishing to make an oral statement at the public hearing for
the record is encouraged to provide a written copy of their statement
to us at the hearing. In the event there is a large attendance, the
time allotted for oral statements may be limited. Speakers can sign up
at the informational meeting and hearing if they desire to make an oral
statement. Oral and written statements receive equal consideration.
There are no limits on the length of written comments submitted to us.
If you have any questions concerning the public hearing or need
reasonable accommodations to attend and participate in the public
hearing, please contact the Denver Regional Office's Ecological
Service's Division at 303-236-7400 [see FOR FURTHER INFORMATION CONTACT
section below], as soon as possible, but no later than 1 week before
the hearing date, to allow sufficient time to process requests.
Information regarding the proposal is available in alternative formats
upon request.
Peer Review
In accordance with our joint policy on peer review published in the
Federal Register on July 1, 1994 (59 FR 34270), we intend to subject
this proposal to peer review. A peer review panel will conduct this
assessment. We anticipate this assessment will be completed during the
public comment period and posted online at https://www.regulations.gov
to allow for public review and comment.
We will consider all comments and information received during this
comment period on this proposed rule during our preparation of a final
determination. Accordingly, the final decision may differ from this
proposal.
Table of Contents
Background
Delisting Wolves in Wyoming--The Focus of This Rule
Previous Federal Actions
Reengaging Wyoming and Changes to Their Wolf Management Plan
Species Description and Basic Biology
Recovery Planning and Implementation
[cir] Recovery Planning and the Development of Recovery Criteria
[cir] Monitoring and Managing Recovery
[cir] Recovery by State
[cir] Recovery by Recovery Area
[cir] Genetic Exchange Relative to Our Recovery Criteria
[cir] Conclusion on Progress Towards Our Recovery Goals
Summary of Factors Affecting the Species
Factor A. The Present or Threatened Destruction, Modification,
or Curtailment of Its Habitat or Range
[cir] Suitable Habitat
[cir] Unoccupied Suitable Habitat
[cir] Currently Occupied Habitat
[cir] Potential Threats Affecting Habitat or Range
Factor B. Overutilization for Commercial, Recreational,
Scientific, or Educational Purposes
[cir] Commercial or Recreational Uses
[cir] Overutilization for Scientific or Educational Purposes
Factor C. Disease or Predation
[cir] Disease
[cir] Natural Predation
[cir] Human-caused Predation
Factor D. The Inadequacy of Existing Regulatory Mechanisms
[cir] National Park Service
[cir] National Wildlife Refuges
[cir] Tribal Lands
[cir] Forest Service
[cir] State Regulatory Mechanisms
[cir] Environmental Protection Agency
Factor E. Other Natural or Manmade Factors Affecting Its
Continued Existence
[cir] Public Attitudes Toward the Gray Wolf
[cir] Genetic Considerations
[cir] Poison
[cir] Climate Change
[cir] Catastrophic Events
[cir] Impacts to Wolf Pack Social Structure as a Result of
Human-Caused Mortality
Conclusion (Including Cumulative Impacts)
Post-Delisting Monitoring
Effects of the Proposed Rule
Required Determinations
Clarity of the Rule
Paperwork Reduction Act
National Environmental Policy Act
Executive Order 13211
Government-to-Government Relationship With Tribes
References Cited
Authority
List of Subjects in 50 CFR Part 17
Proposed Regulation Promulgation
Background
Delisting Wolves in Wyoming--The Focus of This Rule
This proposed rule focuses on the Wyoming portion of the NRM DPS,
except where discussion of the larger GYA or NRM metapopulation is
necessary to understand impacts to wolves in Wyoming. This rulemaking
is separate and independent from, but additive to, the previous action
delisting wolves in the NRM DPS (74 FR 15123, April 2, 2009; 76 FR
25590, May 5, 2011). We believe this approach is appropriate given the
Congressional directive to reissue our 2009 delisting, which created a
remnant piece of the NRM DPS. This approach is also consistent with our
2009 delisting determination which stated that ``if Wyoming were to
develop a Service-approved regulatory framework it would be delisted in
a separate rule'' (74 FR 15123, April 2, 2009, p. 15155). This proposal
does not depend on, or implicate our previous, separate action to
remove the other portions of the NRM DPS from the List of Endangered
and Threatened Wildlife. Outside Wyoming, this rule will not affect the
status of the gray wolf in the portions of the NRM DPS under State laws
or suspend any other legal protections provided by State law.
Previous Federal Actions
In 1967, we determined the eastern timber wolf (C. l. lycaon) in
the Great Lakes region was threatened with extinction (32 FR 4001,
March 11, 1967). In 1973, we added the NRM gray wolf (C. l. irremotus)
to the U.S. List of Endangered Fish and Wildlife (38 FR 14678, June 4,
1973). Both of these listings were pursuant to the Endangered Species
Conservation Act of 1969. In 1974, these subspecies were listed as
endangered under the Act of 1973 (39 FR 1158, January 4, 1974). We
listed a third gray wolf subspecies, the Mexican wolf (C. l. baileyi)
as endangered on April 28, 1976 (41 FR 17736) in Mexico and the
southwestern United States. In 1976, we listed the Texas gray wolf
subspecies (C. l. monstrabilis) as endangered in Texas and Mexico (41
FR 24062, June 14, 1976).
Due to questions about the validity of subspecies classification at
the time and issues associated with the narrow geographic scope of each
subspecies, we published a rule reclassifying the gray wolf as
endangered at the species level (C. lupus) throughout the coterminous
48 States and Mexico (43 FR 9607, March 9, 1978). The exception was
Minnesota, where the gray wolf was reclassified to threatened. This
rule also provided assurance that this reclassification would not alter
our intention to focus recovery on each population as separate
entities. Accordingly, recovery plans were developed for: The Great
Lakes in 1978 (revised in 1992) (Service 1978, entire; Service 1992,
entire); the NRM region in 1980 (revised in 1987) (Service 1980,
entire; Service 1987, entire); and the Southwest in 1982 (Service 1982,
entire). A revision to the southwest recovery plan is now under way.
In 1994, we designated portions of Idaho and Montana, and all of
Wyoming as nonessential experimental gray wolf populations under
section 10(j) of the Act (50 CFR 17.84(i)), including the Yellowstone
Experimental Population Area (59 FR 60252, November 22, 1994) and the
Central Idaho Experimental Population Area (59 FR 60266,
[[Page 61784]]
November 22, 1994). These designations assisted us in initiating gray
wolf reintroductions in central Idaho and in Yellowstone National Park
(YNP). The Yellowstone Experimental Population Area included the entire
State of Wyoming. In 2005 and 2008, we revised these regulations to
provide increased management flexibility for this recovered wolf
population in States and on Tribal lands with Service-approved post-
delisting wolf management plans (70 FR 1286, January 6, 2005; 73 FR
4720, January 28, 2008; 50 CFR 17.84(n)).
The NRM gray wolf population achieved its numerical and
distributional recovery goals at the end of 2000 (Service et al. 2011,
Table 4). The temporal portion of the recovery goal was achieved in
2002 when the numerical and distributional recovery goals were exceeded
for the third successive year (Service et al. 2011, Table 4). In light
of this success, we once reclassified and twice delisted all or part of
this population (68 FR 15804, April 1, 2003; 73 FR 10514, February 27,
2008; 74 FR 15123, April 2, 2009). These reclassification and delisting
rules were overturned by Federal District courts (Defenders of
Wildlife, et al. v. Norton, et al., 354 F.Supp.2d 1156 (D. Or. 2005);
National Wildlife Federation, et al. v. Norton, et al., 386 F.Supp.2d
553 (D. Vt. 2005); Defenders of Wildlife, et al. v. Hall, et al., 565
F.Supp.2d 1160 (D. Mont. 2008); Defenders of Wildlife, et al. v.
Salazar, et al., 729 F.Supp.2d 1207 (D. Mont. 2010). Each of these
rulemakings and the subsequent litigation are discussed below.
In 2003, we reclassified the coterminous 48-State listing into
three DPSs including a threatened Western DPS, a threatened Eastern
DPS, and an endangered Southwestern DPS (68 FR 15804, April 1, 2003).
The Western DPS, centered around the recovered NRM gray wolf
population, included California, northern Colorado, Idaho, Montana,
Oregon, northern Utah, Washington, and Wyoming. This rule also removed
the protections of the Act for gray wolves in all or parts of 16
southern and eastern States where the species historically did not
occur. Finally, this rule established a special 4(d) rule to respond to
wolf-human conflicts in areas not covered by existing nonessential
experimental population rules. In 2005, the U.S. District Courts in
Oregon and Vermont concluded that the 2003 final rule was ``arbitrary
and capricious'' and violated the Act (Defenders of Wildlife, et al. v.
Norton, et al., 354 F.Supp.2d 1156 (D. Or. 2005); National Wildlife
Federation, et al. v. Norton, et al., 386 F.Supp.2d 553 (D. Vt. 2005)).
Both courts ruled the Service improperly downlisted entire DPSs based
just on the viability of a core population. The courts' rulings
invalidated the April 2003 changes to the gray wolf listing under the
Act.
In 2003, we also published an advanced notice of proposed
rulemaking announcing our intention to delist the Western DPS as the
recovery goals had been satisfied (68 FR 15879, April 1, 2003). This
notice explained that delisting would require consideration of threats,
and that the adequacy of State wolf management plans to address threats
in the absence of protections of the Act would be a major determinant
in any future delisting evaluation.
In 2004, we determined that Montana's and Idaho's laws and wolf
management plans were adequate to assure that their shares of the NRM
wolf population would be maintained above recovery levels (Williams
2004a, in litt.; Williams 2004b, in litt.). However, we also found the
2003 Wyoming legislation and plan would not ensure maintenance of
Wyoming's share of a recovered NRM gray wolf population (Williams
2004c, in litt.). Wyoming challenged this determination, and the United
States District Court in Wyoming dismissed the case (State of Wyoming,
et al. v. United States Department of Interior, et al., 360 F.Supp.2d
1214, (D. Wyoming 2005)). Wyoming's subsequent appeal was unsuccessful
(State of Wyoming, et al. v. United States Department of Interior, et
al., 442 F.Supp.3d 1262 (10th Cir. 2006)). Wyoming lost this case on
procedural grounds because it failed to identify a final agency action
necessary to confer standing prior to the litigation. To address this
procedural shortcoming, in 2005, Wyoming petitioned us to revise the
listing status for the gray wolf by recognizing a NRM DPS and to remove
it from the Federal List of Endangered and Threatened Species
(Freudenthal 2005, entire). In 2006, we announced a 12-month finding
that Wyoming's petition (delisting wolves in all of Montana, Idaho, and
Wyoming) was not warranted because the 2003 Wyoming State laws and its
2003 wolf management plan did not provide adequate regulatory
mechanisms to ensure that Wyoming's share of a recovered NRM wolf
population would be conserved (71 FR 43410, August 1, 2006). Wyoming
challenged this finding in Wyoming Federal District Court. This
challenge was made moot by Wyoming's revisions to its laws and
management plan in 2007, which allowed delisting to move forward. On
February 27, 2008, a Wyoming Federal District Court issued an order
dismissing the case (State of Wyoming, et al. v. United States
Department of Interior, et al., U.S. District Court Case No. 2:06-CV-
00245).
In 2008, we issued a final rule recognizing the NRM DPS and
removing it from the List of Endangered and Threatened Wildlife (73 FR
10514, February 27, 2008). This DPS included Idaho, Montana, eastern
Oregon, north-central Utah, eastern Washington, and Wyoming. This DPS
was smaller than the 2003 Western DPS and more closely approximates the
historic range of the originally listed NRM gray wolf in the United
States and the areas focused on in both NRM recovery plans (39 FR 1171,
January 4, 1974; Service 1980, pp. 3, 7-8; Service 1987, pp. 2, 23).
The Service removed protections across the entire DPS after Wyoming
revised its wolf management plan and State law. At the time, we
concluded this Wyoming framework provided adequate regulatory
protections to conserve Wyoming's portion of a recovered wolf
population into the foreseeable future (Hall 2007, in litt.).
Environmental litigants challenged this final rule in the U.S.
District Court for the District of Montana. The plaintiffs also moved
to preliminarily enjoin the delisting. On July 18, 2008, the court
granted the plaintiffs' motion for a preliminary injunction and
enjoined the Service's implementation of the final delisting rule
(Defenders of Wildlife, et al., v. Hall, et al., 565 F.Supp.2d 1160 (D.
Mont. 2008)). The court stated that we acted arbitrarily in delisting a
wolf population that lacked evidence of natural genetic exchange
between subpopulations. The court also stated that we acted arbitrarily
and capriciously when we approved Wyoming's 2007 wolf management plan
because the State failed to commit to managing for at least 15 breeding
pairs, and Wyoming's 2007 statute allowed the Wyoming Game and Fish
Commission (WGFC) to diminish the trophy game area if it ``determines
the diminution does not impede the delisting of gray wolves and will
facilitate Wyoming's management of wolves.'' In light of the court
order, on September 22, 2008, we asked the court to vacate the final
rule and remand it to us. On October 14, 2008, the court granted our
request (Defenders of Wildlife v. Hall, 9:08-CV-00056-DWM (D. Mont
2008)). The court's rulings invalidated the February 2008 rule
designating and delisting the NRM DPS.
Following the July 18, 2008 court ruling, we reexamined the NRM DPS
and Wyoming's statutes, regulations, and management plan. This
[[Page 61785]]
reevaluation considered several issues not considered in the previous
evaluation. We determined that the best scientific and commercial data
available demonstrated that: (1) The NRM DPS was not threatened or
endangered throughout ``all'' of its range (i.e., not threatened or
endangered throughout all of the DPS); and (2) the Wyoming portion of
the range represented a significant portion of its range where the
species remained in danger of extinction because of the inadequacy of
existing regulatory mechanisms. Thus, on April 2, 2009, we published a
final rule recognizing the NRM DPS and removing the DPS from the List
of Endangered and Threatened Wildlife, except in Wyoming, where wolves
continued to be regulated as a nonessential, experimental population
under 50 CFR 17.84(i) and (n) (74 FR 15123). The decision to retain the
Act's protections only in Wyoming was consistent with a March 16, 2007,
Memorandum Opinion issued by the Solicitor of the Department of the
Interior, ``The Meaning of `In Danger of Extinction Throughout All or a
Significant Portion of Its Range' '' (M-Opinion) (Department of the
Interior 2007, in litt.). The final rule determined that Wyoming's
existing regulatory framework did not provide the necessary regulatory
mechanisms to assure that Wyoming's share of a recovered NRM wolf
population would be conserved if the protections of the Act were
removed and stated that, until Wyoming revised its statutes,
regulations, and management plan, and obtained Service approval, wolves
in Wyoming would remain protected by the Act (74 FR 15123, April 2,
2009).
The April 2009 rule (74 FR 15123, April 2, 2009) was challenged in
the U.S. District Court for the District of Montana by environmental
litigants and in the U.S. District Court for the District of Wyoming by
the State of Wyoming, the Wyoming Wolf Coalition, and Park County,
Wyoming. On August 5, 2010, the U.S District Court for Montana ruled on
the merits of the case and vacated our April 2009 final rule (Defenders
of Wildlife, et al. v. Salazar, et al., 729 F. Supp.2d 1207 (D. Mont.
2010)). The court concluded that the NRM DPS must be listed or delisted
in its entirety. The court rejected the rule's approach allowing
protection of only a portion of the species' range because it was
inconsistent with the Act's definition of ``species.'' (The Department
of Interior withdrew the M-Opinion on this topic on May 4, 2011
(Department of the Interior 2011, in litt.)). Thus, before delisting
could occur, Wyoming had to develop a regulatory framework that was
determined by the Service to be adequate to maintain Wyoming's share of
a recovered NRM gray wolf population. The court's ruling invalidated
the April 2009 rule designating and delisting most of the NRM DPS.
On October 26, 2010, in compliance with the order of the U.S.
District Court for Montana, we published a final rule notifying the
public that the Federal protections in place prior to the 2009
delisting had been reinstated (75 FR 65574). Wolves in eastern
Washington, eastern Oregon, northcentral Utah, the Idaho panhandle, and
northern Montana were again listed as endangered. Former special rules
designating the gray wolf in the remainder of Montana and Idaho as
nonessential experimental populations were likewise reinstated.
Additionally, the NRM gray wolf DPS established by the April 2, 2009,
final rule was set aside. Because wolves in Wyoming were not delisted
by the April 2, 2009 final rule, their listed status was not impacted
by the October 26, 2010 rule.
Following the Montana District Court decision, the United States
Congress passed, and President Obama signed, H.R. 1473, Public Law 112-
10--The Department of Defense and Full Year Continuing Appropriations
Act of 2011. Section 1713 of the law directed the Service to reissue
its April 2009 delisting rule. The Service complied with this directive
on May 5, 2011 (76 FR 25590). The constitutionality of H.R. 1473 was
challenged by environmental plaintiffs (Alliance for the Wild Rockies
et al., v. Salazar, et al., case no. CV 11-70-M-DWM). The United States
District Court for Montana ruled on August 3, 2011, that the law was
constitutional. This ruling was appealed to the Ninth Circuit (Alliance
for the Wild Rockies, et al., v. Salazar, et al., case no. 11-35670).
Plaintiffs also filed an emergency motion for injunction in order to
stop Idaho's and Montana's planned fall 2011 hunts, which was denied.
As of this writing, a decision on the appeal is pending.
As for the Wyoming challenge to the April 2009 partial delisting
rule (74 FR 15123, April 2, 2009), a United States District Court for
Wyoming ruled in favor of the three Wyoming plaintiffs on November 18,
2010 (Wyoming et al., v. U.S. Department of the Interior, et al., 2010
U.S. Dist. LEXIS 122829). The court rejected the Service position that
recommended the entire State of Wyoming be designated as a trophy game
area and found this position to be arbitrary and capricious, as it was
not supported by the administrative record. The court concluded that
the record indicated only northwestern Wyoming, which has the vast
majority of the State's suitable habitat, was biologically essential to
maintenance of the NRM population. However, the court did not render an
opinion on whether Wyoming's current plan, including the proposed size
and location of its 2007 trophy game area, was sufficient. Instead, the
court remanded the matter to us to reconsider whether Wyoming's
regulatory framework would maintain its share of a recovered wolf
population and provide adequate genetic connectivity. Subsequent to
this order, the Service and the State reinitiated negotiations on
revisions to their wolf management framework that would satisfy the
standards of the Act and allow delisting to again move forward. The
results of this process led to development of a revised wolf management
plan and are incorporated in this proposal.
Reengaging Wyoming and Changes to Their Wolf Management Plan
The April 2009 rule stated that ``until Wyoming revises their
statutes, management plan, and associated regulations, and is again
Service approved, wolves in Wyoming continue to require the protections
of the Act'' (74 FR 15123, April 2, 2009). This rule specifically
expressed concern over: (1) The size and permanency of Wyoming's Wolf
Trophy Game Management Area (WTGMA); (2) conflicting language within
the State statutes concerning whether Wyoming would manage for at least
15 breeding pairs and at least 150 wolves, exactly 15 breeding pairs
and 150 wolves, or only 7 breeding pairs and 70 wolves; and (3) liberal
depredation control authorizations and legislative mandates to
aggressively manage the population down to minimum levels.
In early 2011, we began discussions with Wyoming seeking to develop
a strategy for each of these issues. In August 2011, the Service and
the State of Wyoming announced the framework of an agreement that we
believe will allow us to delist wolves in Wyoming (WGFC 2011, appendix
I). Following this announcement, Wyoming revised their 2008 wolf
management plan (WGFC 2008, entire) to reflect the terms of this
agreement (WGFC 2011, entire). Below we summarize the key points in the
agreement relative to the three overarching Service concerns
highlighted above.
First, this agreement commits Wyoming to make permanent the
existing WTGMA. In total, Wyoming wolves will be permanently managed as
game animals or protected (e.g., in
[[Page 61786]]
National Parks) in about 40,000 km\2\ (15,400 mi\2\) in the
northwestern portion of the State (15.7 percent of Wyoming), including
YNP, Grand Teton National Park, John D. Rockefeller Memorial Parkway,
adjacent U.S. Forest Service-designated Wilderness Areas, adjacent
public and private lands, the National Elk Refuge, and the Wind River
Indian Reservation (Lickfett 2011, in litt.). Wolves will be designated
as predatory animals in the remainder of the State (predator area). The
above protected and game areas (see Figure 1) include: 100 percent of
the portion of the GYA recovery area within Wyoming (Service 1987,
Figure 2); approximately 79 percent of the portion of the primary
analysis area in Wyoming focused on by the 1994 reintroduction EIS
(Service 1994, Figure 1.1); the entire home range for 24 of 27 breeding
pairs in Wyoming and 24 of 34 packs in the State (Service et al. 2011,
Figure 3); and approximately 76 percent of the State's suitable habitat
as determined by Oakleaf et al. (2006, entire) (including 81 percent of
the high-quality habitat (with an 80 percent or greater chance of
supporting wolves) and 62 percent of the medium-high-quality habitat
(with a 50 to 79 percent chance of supporting wolves) (Oakleaf 2011, in
litt.)). This area is of sufficient size to support a recovered wolf
population in Wyoming, under the management regime proposed for this
area.
BILLING CODE 4310-55-P
[[Page 61787]]
[GRAPHIC] [TIFF OMITTED] TP05OC11.000
BILLING CODE 4310-55-C
The Service's prior concern that the size of the WTGMA would impact
natural connectivity and genetic exchange was also addressed in the
agreement. The agreement and the State's wolf management plan clearly
articulate a goal for gene flow of at least one effective natural
migrant per generation entering into the GYA, as measured over multiple
generations (WGFC 2011, pp. 4, 9, 26-29, 54). To address our concerns
about genetics and connectivity, Wyoming agreed to a seasonal expansion
of the WTGMA. This seasonal adjustment expands the WTGMA approximately
80 kilometers (km) (50 miles (mi)) south for four and a half months
during peak wolf dispersal periods (WGFC 2011, pp. 2, 8, 52). We
believe this will benefit natural dispersal. Furthermore, Wyoming
commits to an adaptive management approach that adjusts management if
the above minimum level of gene flow is not documented, as well as to
use human-assisted migration if necessary (WGFC 2011, pp. 26-29).
Collectively, these measures will ensure that inbreeding depression
resulting from
[[Page 61788]]
the loss of genetic diversity never threatens the population.
Next, Wyoming agreed to maintain a population of at least 10
breeding pairs and at least 100 wolves in areas under State
jurisdiction (WGFC 2011, pp. 1-5, 16-26, 52). Importantly, this
commitment does not reflect an intention by Wyoming Game and Fish
Department (WGFD) to reduce the population down to this minimum
population level. Rather, Wyoming intends to maintain an adequate
buffer above minimum population objectives to accommodate management
needs (the desire to hunt wolves annually) and ensure uncontrollable
sources of mortality (such as disease or take in defense of property)
do not drop the population below this minimum population level (WGFC
2011, p. 24). This management strategy will provide for the
population's representation, resiliency, and redundancy (Shaffer and
Stein 2000, entire) within the GYA as well as improve public acceptance
for wolves outside YNP.
The wolf populations in YNP and on the lands of sovereign nations
will provide an additional buffer above the minimum recovery goal
intended by the step-down management objective of at least 15 breeding
pairs and at least 150 wolves Statewide (see ``Recovery Planning and
Implementation'' below for more information). From 2001 to the end of
2010, the wolf population in YNP ranged from 96 to 171 wolves, and
between 6 to 16 breeding pairs, with an average of 9.8 breeding pairs.
While a lower long-term future population level in YNP is predicted
(Smith 2010, pers. comm.), YNP will always provide a large, secure wolf
population providing a safety margin above the minimum recovery goal.
The Wind River Indian Reservation typically contains a small number of
wolves (single digits), which sometimes form packs that count toward
Tribal population totals. On the whole, we expect the statewide wolf
population in Wyoming will be maintained well above minimum recovery
levels.
Another substantial improvement is Wyoming's management framework
inside the WTGMA. For example, Wyoming has committed to remove current
statutory mandates for aggressive management of wolves (WGFC 2011, pp.
24, 52). Current Wyoming law requires aggressive management until the
population outside the National Parks falls to six breeding pairs or
below. This issue was a major Service concern with Wyoming's existing
law, and will be remedied.
Additionally, Wyoming agreed wolves in the permanent or seasonal
WTGMA would never be treated as predatory animals (WGFC 2011, pp. 3,
16-17, 23). Existing State laws allow depredating wolves within the
WTGMA to be treated as predatory animals under certain circumstances at
the discretion of the State Fish and Game Commission (WGFC 2011, pp. 3,
16-17, 23). Wyoming has indicated an intention to modify W.S. 23-1-
302(a)(ii) to ensure it does not apply to wolves in the WTGMA. This
change is a substantial improvement over current Wyoming law that will
help ensure that the wolf population in Wyoming (outside of YNP and the
Wind River Indian Reservation) always remains at or above 10 breeding
pairs and 100 individuals.
Furthermore, Wyoming intends to establish defense-of-property
regulations that are similar to our nonessential experimental
population rules (50 CFR 17.84(n)) (WGFC 2011, pp. 4, 22-23, 30-31,
53). Also, management of depredating wolves will be similar to Service
management under the Act's protections (WGFC 2011, pp. 4, 22-23, 30-31,
53). Such rules were in place in Montana and Idaho prior to delisting
and allowed continued population growth. These management approaches
are an additional improvement over the framework Wyoming had in place
for most of 2008.
These, and other improvements discussed in more detail below, have
addressed the Service's concerns about wolf management in Wyoming and
made this proposed delisting rule possible. Wyoming's wolf management
plan was recently revised to reflect the new agreement (WGFC 2011,
entire). However, conforming changes to Wyoming State law and WGFC
regulations are also necessary to implement this plan. Wyoming
recognizes statutory and regulatory changes will be required to
implement this agreement and intends to pursue these changes. These
changes will be made prior to any final decision that delists gray
wolves in Wyoming.
Species Description and Basic Biology
Gray wolves (Canis lupus) are the largest wild members of the dog
family (Canidae). Adult gray wolves range from 18-80 kilograms (kg)
(40-175 pounds (lb)) depending upon sex and geographic region (Mech
1974, p. 1). In the NRM region, adult male gray wolves average just
over 45 kg (100 lb), but may weigh up to 60 kg (130 lb). Females weigh
about 20 percent less than males. Wolves' fur color is frequently a
grizzled gray, but it can vary from pure white to coal black (Gipson et
al. 2002, p. 821).
Gray wolves have a circumpolar range including North America,
Europe, and Asia. As Europeans began settling the United States, they
poisoned, trapped, and shot wolves, causing this once-widespread
species to be eradicated from most of its range in the 48 conterminous
States (Mech 1970, pp. 31-34; McIntyre 1995, entire). Gray wolf
populations were eliminated from Montana, Idaho, and Wyoming, as well
as adjacent southwestern Canada by the 1930s (Young and Goldman 1944,
p. 414).
Wolves primarily prey on medium and large mammals. Wolf prey in the
NRM region is composed mainly of elk (Cervus canadensis), white tailed
deer (Odocoileus virginianus), mule deer (Odocoileus hemionus), moose
(Alces alces), and (in the GYA) bison (Bison bison). Bighorn sheep
(Ovis canadensis), mountain goats (Oreamnos americanus), and pronghorn
antelope (Antilocapra americana) also are common but less important, at
least to date, as wolf prey.
Wolves normally live in packs of 2 to 12 animals. In the NRM
region, pack sizes average 7 wolves but are slightly larger in
protected areas. A few complex packs have been substantially bigger in
some areas of YNP (Smith et al. 2006, p. 243; Service et al. 2011,
Tables 1-3). Packs typically occupy large distinct territories from 518
to 1,295 square kilometers (km\2\) (200 to 500 square miles (mi\2\))
and defend these areas from other wolves or packs. Once a given area is
occupied by resident wolf packs, it becomes saturated and wolf numbers
become regulated by the amount of available prey, intra-species
conflict, other forms of mortality, and dispersal. Dispersing wolves
may cover large areas as they try to join other packs or attempt to
form their own pack in unoccupied habitat (Mech and Boitani 2003, pp.
11-17).
Typically, only one male and female in each pack breed and produce
pups (Packard 2003, p. 38; Smith et al. 2006, pp. 243-4; Service et al.
2011, Tables 1-3). Females and males typically begin breeding as 2-
year-olds and may annually produce young until they are over 10 years
old. In the NRM region, litters are typically born in mid to late April
and range from 1 to 7 pups, but average around 5 pups (Service et al.
1989-2011, Tables 1-3). Most years, four pups survive until winter
(Service et al. 1989-2011, Tables 1-3). Wolves can live 13 years
(Holyan et al. 2005, p. 446), but the average lifespan in the NRM
region is less than 4 years (Smith et al. 2006, p. 245). Pup production
and survival can increase when wolf density is lower and food
availability per wolf increases (Fuller et al. 2003, p. 186). Pack
social structure is very adaptable and resilient. Breeding members can
be
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quickly replaced either from within or outside the pack, and pups can
be reared by another pack member should their parents die (Packard
2003, p. 38; Brainerd et al. 2008; Mech 2006, p. 1482). Consequently,
wolf populations can rapidly recover from severe disruptions, such as
very high levels of human-caused mortality or disease. After severe
declines, wolf populations can more than double in just 2 years if
mortality is reduced; increases of nearly 100 percent per year have
been documented in low-density suitable habitat (Fuller et al. 2003,
pp. 181-183; Service et al. 2011, Table 4).
For detailed information on the biology of this species see the
``Biology and Ecology of Gray Wolves'' section of the April 1, 2003,
final rule to reclassify and remove the gray wolf from the list of
endangered and threatened wildlife in portions of the conterminous
United States (2003 Reclassification Rule) (68 FR 15804).
Recovery Planning and Implementation
This section discusses recovery planning and implementation.
Specifically, this section includes a detailed discussion of the
recovery criteria including their development, continuous evaluation,
and revision as necessary. Finally, this section includes our summary
of progress towards recovery including an assessment of whether the
criteria are met. This section discusses the entire NRM population
because the recovery criteria apply to the entire population.
Recovery Planning and the Development of Recovery Criteria--Shortly
after the gray wolf was listed, we formed the Interagency Wolf Recovery
Team to complete a recovery plan for the NRM population (Service 1980,
p. i; Fritts et al. 1995, p. 111). The NRM Wolf Recovery Plan (recovery
plan) was approved in 1980 (Service 1980, p. i) and revised in 1987
(Service 1987, p. i). Recovery plans are not regulatory documents, but
are instead intended to provide guidance to the Service, States, and
other partners on methods of minimizing threats to listed species and
on criteria that may be used to determine when recovery is achieved.
There are many paths to accomplishing recovery of a species, and
recovery may be achieved without all criteria being fully met. For
example, one or more criteria may have been exceeded while other
criteria may not have been accomplished. In that instance, the Service
may judge that the threats have been minimized sufficiently, and the
species is robust enough to reclassify from endangered to threatened or
to delist. In other cases, recovery opportunities may have been
recognized that were not known at the time the recovery plan was
finalized. These opportunities may be used instead of methods
identified in the recovery plan. Likewise, information on the species
may be learned that was not known at the time the recovery plan was
finalized. The new information may change the extent that criteria need
to be met for recognizing recovery of the species. Recovery of a
species is a dynamic process requiring adaptive management that may, or
may not, fully follow the guidance provided in a recovery plan.
The 1980 recovery plan's objective was to reestablish and maintain
viable populations of the NRM wolf (C. l. irremotus) in its former
range where feasible (Service 1980, p. iii). This plan did not include
recovery goals (i.e., delisting criteria). The 1980 plan covered an
area similar to the NRM DPS, as it was once believed to be the range of
the purported NRM wolf subspecies. It recommended that recovery actions
be focused on the large areas of public land in northwestern Montana,
central Idaho, and the GYA. The 1987 revised recovery plan (Service
1987, p. 57) concluded that the subspecies designations may no longer
be valid and simply referred to gray wolves in the NRM region.
Consistent with the 1980 plan, it also recommended focusing recovery
actions on the large blocks on public land in the NRM region.
The 1987 plan specified a recovery criterion of a minimum of 10
breeding pairs of wolves (defined as 2 wolves of opposite sex and
adequate age, capable of producing offspring) for a minimum of 3
successive years in each of 3 distinct recovery areas including: (1)
Northwestern Montana (Glacier National Park; the Great Bear, Bob
Marshall, and Lincoln Scapegoat Wilderness Areas; and adjacent public
and private lands); (2) central Idaho (Selway-Bitterroot, Gospel Hump,
Frank Church River of No Return, and Sawtooth Wilderness Areas; and
adjacent, mostly Federal, lands); and (3) the YNP area (including the
Absaroka-Beartooth, North Absaroka, Washakie, and Teton Wilderness
Areas; and adjacent public and private lands). That plan recommended
that wolf establishment not be promoted outside these distinct recovery
areas, but it encouraged connectivity between recovery areas. However,
no attempts were made to prevent wolf pack establishment outside of the
recovery areas unless chronic conflict required resolution (Service
1994, pp. 1-15, 16; Service 1999, p. 2). Since completion of the 1987
recovery plan, we have expended considerable effort to develop,
repeatedly reevaluate, and when necessary modify, the recovery goals
(Service 1987, p. 12; Service 1994, Appendix 8 and 9; Fritts and Carbyn
1995, p. 26; Bangs 2002, p. 1; 73 FR 10514, February 27, 2008; 74 FR
15123, April 2, 2009, and this proposed rule).
The 1994 Environmental Impact Statement on The Reintroduction of
Gray Wolves to Yellowstone National Park and Central Idaho (EIS)
reviewed wolf recovery in the NRM region and the adequacy of the
recovery goals to assure that the 1987 goals were sufficient (Service
1994, pp. 6:68-78). We were particularly concerned about the 1987
definition of a breeding pair, since any male and female wolf are
`capable' of producing offspring and lone wolves may not have
territories. We also believed the relatively small recovery areas
identified in the 1987 plan greatly reduced the amount of area that
could be used by wolves and would almost certainly eliminate the
opportunity for meaningful natural demographic and genetic
connectivity. We conducted a thorough literature review of wolf
population viability analysis and minimum viable populations, reviewed
the recovery goals for other wolf populations, surveyed the opinions of
the top 43 wolf experts in North America (of which 25 responded), and
incorporated our own expertise into a review of the NRM wolf recovery
goal. We published our analysis in the EIS and a peer-reviewed paper
(Service 1994, Appendix 8 & 9; Fritts and Carbyn 1995, pp. 26-38).
Our 1994 analysis concluded that the 1987 recovery goal was, at
best, a minimum recovery goal, and that modifications were warranted on
the basis of more recent information about wolf distribution,
connectivity, and numbers. We also concluded ``Data on survival of
actual wolf populations suggest greater resiliency than indicated by
theory'' and theoretical treatments of population viability ``have
created unnecessary dilemmas for wolf recovery programs by overstating
the required population size'' (Fritts and Carbyn 1995, p. 26). Based
on our analysis, we redefined a breeding pair as an adult male and an
adult female wolf that have produced at least 2 pups that survived
until December 31 of the year of their birth, during the previous
breeding season. We also concluded that ``Thirty or more breeding pairs
comprising some 300+ wolves in a metapopulation (a population that
exists as partially isolated sets of subpopulations) with genetic
exchange between subpopulations should have a high
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probability of long-term persistence'' because it would contain enough
individuals in successfully reproducing packs that were distributed
over distinct but somewhat connected large areas, to be viable for the
longterm (Service 1994, p. 6:75). We explicitly stated the required
genetic exchange could occur by natural means or by human-assisted
migration management and that dispersal of wolves between recovery
areas was evidence of that genetic exchange (Service et al. 1994,
Appendix 8, 9). In defining a ``Recovered Wolf Population'' we found
``in the northern Rockies a recovered wolf population is 10 breeding
pairs of wolves in each of 3 areas for 3 successive years with some
level of movement between areas'' (Service 1994, pp. 6-7). We further
determined that a metapopulation of this size and distribution among
the three areas of core suitable habitat in the NRM DPS would result in
a wolf population that would fully achieve our recovery objectives.
For more than 15 years, we have concluded that movement of
individuals between the metapopulation segments could occur either
naturally or by human-assisted migration management (Service 1994, pp.
7-67). Specifically, the 1994 EIS stated ``The importance of movement
of individuals between sub-populations cannot be overemphasized. The
dispersal ability of wolves makes such movement likely, unless wolves
were heavily exploited between recovery areas, as could happen in the
more developed corridor between central Idaho and YNP. Intensive
migration management might become necessary if 1 of the 3 sub-
populations should develop genetic or demographic problems.'' (Service
1994, pp. 7-67). The finding went on to say that human-assisted
migration should not be viewed negatively and would be necessary in
other wolf recovery programs (Service 1994, pp. 7-67). Furthermore, we
found that the 1987 wolf recovery plan's population goal of 10 breeding
pairs of wolves in 3 separate recovery areas for 3 consecutive years
was reasonably sound and would maintain a viable wolf population into
the foreseeable future. We did caution that the numerical recovery goal
was somewhat conservative, and should be considered minimal (Service
1994, pp. 6-75).
We conducted another review of what constitutes a recovered wolf
population in late 2001 and early 2002 to reevaluate and update our
1994 analysis and conclusions (Service 1994, Appendix 9). We attempted
to resurvey the same 43 experts we had contacted in 1994 as well as 43
other biologists from North America and Europe who were recognized
experts about wolves and conservation biology. We asked experts with a
wide diversity of perspectives to participate in our review. In total,
53 people provided their expert opinion regarding a wide range of
issues related to the NRM recovery goal. We also reviewed a wide range
of literature, including wolf population viability analyses from other
areas (Bangs 2002, pp. 1-9).
Despite varied professional opinions and a great diversity of
suggestions, experts overwhelmingly thought the recovery goal derived
in our 1994 analysis was more biologically appropriate than the 1987
recovery plan's criteria for recovery and represented a viable and
recovered wolf population. Reviewers also thought genetic exchange,
either natural or human-facilitated, was important to maintaining the
metapopulation configuration and wolf population viability. Reviewers
also believed the proven ability of a breeding pair to show successful
reproduction was a necessary component of a biologically meaningful
breeding pair definition. Reviewers recommended other concepts/numbers
for recovery goals, but most were slight modifications to those we
recommended in our 1994 analysis. While experts strongly (78 percent)
supported our 1994 conclusions regarding a viable wolf population, they
also tended to believe that wolf population viability was enhanced by
higher, rather than lower, population levels and longer, rather than
shorter, demonstrated timeframes.
A common minority recommendation was an alternative goal of 500
wolves and 5 years. A slight majority of reviewers indicated that even
the 1987 recovery goal of only 10 breeding pairs (defined as a male and
female capable of breeding) in each of 3 distinct recovery areas may be
viable, given the persistence of other small wolf populations in other
parts of the world. The results of previous population viability
analyses for other wolf populations varied widely, and as we had
concluded in our 1994 analysis, reviewers in 2002 concluded theoretical
results were strongly dependent on the variables and assumptions used
in such models and conclusions often predicted different outcomes than
actual empirical data had conclusively demonstrated. Based on that
review, we reaffirmed our more relevant and stringent 1994 definition
of wolf breeding pairs, population viability, and recovery (Service
1994, p. 6:75; Bangs 2002, pp. 1-9).
We measure the wolf recovery goal by the number of breeding pairs
as well as by the number of wolves because wolf populations are
maintained by packs that successfully raise pups. We use ``breeding
pairs'' (packs that have at least one adult male and at least one adult
female and that raised at least two pups until December 31) to describe
successfully reproducing packs (Service 1994, p. 6:67; Bangs 2002, pp.
7-8; Mitchell et al. 2008, p. 881; Mitchell et al. 2010, p. 101). The
breeding pair metric includes most of the important biological concepts
in wolf conservation, including the potential disruption of human-
caused mortality that might affect breeding success in social
carnivores (Brainerd et al. 2008, p. 89; Wallach et al. 2009, p. 1;
Creel and Rotella 2010, p. 1). Specifically, we thought it was
important for breeding pairs to have: both male and female members
together going into the February breeding season; successful occupation
of a distinct territory (generally 500-1,300 km\2\ (200-500 mi\2\) and
almost always in suitable habitat; enough pups to replace themselves;
offspring that become yearling dispersers; at least four wolves
following the point in the year with the highest mortality rates
(summer and fall); all social structures and age classes represented
within a wolf population; and adults that can raise and mentor younger
wolves.
We also have determined that an equitable distribution of wolf
breeding pairs and individual wolves among the three States and the
three recovery zones is an essential part of achieving recovery. Like
peer reviewers in 1994 and 2002, we concluded that NRM wolf recovery
and long-term wolf population viability is dependent on its
distribution as well as maintaining the minimum numbers of breeding
pairs and wolves. While uniform distribution is not necessary, a well-
distributed population with no one State/recovery area maintaining a
disproportionately low number of packs or number of individual wolves
is needed. This approach will maintain wolf distribution in and
adjacent to all three recovery areas and most of the region's suitable
habitat. Such an approach will facilitate natural connectivity.
Following the 2002 review of our recovery criteria, we began to use
States, in addition to recovery areas, to measure progress toward
recovery goals (Service et al. 2003-2011, Table 4). Because Montana,
Idaho, and Wyoming each contain the vast majority of one of the
original three core recovery areas, we determined the metapopulation
structure would be best conserved by
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equally dividing the overall recovery goal between the three States (73
FR 10514, February 27, 2008, p. 10522). This approach made each State's
responsibility for wolf conservation fair, consistent, and clear. It
avoided any possible confusion that one State might assume the
responsibility for maintaining the required number of wolves and wolf
breeding pairs in a shared recovery area that was the responsibility of
the adjacent State. State regulatory authorities and traditional
management of resident game populations occur on a State-by-State
basis. We determined that management by State would still maintain a
robust wolf population in each core recovery area because they each
contain manmade or natural refugia from human-caused mortality (e.g.,
National Parks, wilderness areas, and remote Federal lands) that
guarantee those areas remain the stronghold for wolf breeding pairs and
source of dispersing wolves in each State. Recovery targets by State
promote connectivity and genetic exchange between the metapopulation
segments by avoiding management that focuses solely on wolf breeding
pairs in relatively distinct core recovery areas. This approach also
will increase the numbers of potential wolf breeding pairs in the GYA
because it is shared by all three States. A large and well-distributed
population within the GYA is especially important because it is the
most isolated recovery segment within the NRM DPS (Oakleaf et al. 2005,
p. 554; vonHoldt et al. 2007, p. 19) and the southern tip of a larger
western gray wolf population that now contains more than 14,000 wolves
when combined with western Canada (Boitani 2003, p. 322).
The numerical component of the recovery goal represents the minimum
number of breeding pairs and individual wolves needed to achieve and
maintain recovery. To ensure that the NRM wolf population always
exceeds the recovery goal of 30 breeding pairs and 300 wolves, we
required that each State manage for at least 15 breeding pairs and at
least 150 wolves in mid-winter in accordance with a step-down
management objective. This 50 percent safety margin above minimum
recovery levels was intended to provide an adequate safety margin
recognizing that all wildlife populations, including wolves, can
fluctuate widely over a relatively short period of time. Managing for a
buffer above the minimum recovery target is consistent with our 1994
determination that the addition of a few extra pairs would add security
to the population and should be considered in the post-EIS management
planning (Service 1994, pp. 6-75). Additionally, because the recovery
goal components are measured in mid-winter when the wolf population is
near its annual low point, the average annual wolf population will be
higher than these minimal goals.
Because Wyoming, unlike Montana and Idaho, has a large portion of
its wolf population in areas outside the State's control (e.g., YNP and
the Wind River Indian Reservation), we developed an alternative
approach for Wyoming to achieve the desired safety margin above the
minimum recovery goal. Specifically, we determined that at least 10
breeding pairs and at least 100 wolves at mid-winter in Wyoming outside
YNP and the Wind River Indian Reservation will satisfy Wyoming's
contribution to NRM gray wolf recovery. Under this approach, the wolf
populations in YNP and the Wind River Indian Reservation will provide
the remaining buffer above the minimum recovery goal intended by the
step-down management objective employed in Montana and Idaho (i.e.,
population targets 50 percent above minimum recovery levels).
Wyoming's wolf population will be further buffered because WGFD
intends to maintain an adequate buffer above minimum population
objectives to accommodate management needs and ensure uncontrollable
sources of mortality do not drop the population below the 10 breeding
pair and 100 wolf minimum population level. The State of Wyoming is
also committed to coordinate with YNP and the Wind River Indian
Reservation to contribute to the step-down recovery target of at least
15 breeding pairs and at least 150 wolves statewide, including YNP and
the Wind River Indian Reservation. In our view, this alternative
approach to the step-down wolf population target in Wyoming is
biologically superior to a single statewide standard in that: It
provides population stability outside the park, minimizing the chances
of a bad year in YNP compromising maintenance of the recovery goal
(such a scenario is described in our 2009 delisting rule's analysis of
Wyoming's 2007 wolf plan (74 FR 15123, April 2, 2009)); It adds an
extra layer of representation, resiliency, and redundancy to the
Greater Yellowstone Area's gray wolf population; and it builds public
acceptance for a minimum wolf population outside YNP.
To summarize, based on the information above, the current recovery
goal for the NRM gray wolf population is: Thirty or more breeding pairs
(an adult male and an adult female that raise at least 2 pups until
December 31) comprising 300+ wolves well-distributed between Montana,
Idaho, and Wyoming functioning as a metapopulation (a population that
exists as partially isolated sets of subpopulations) with genetic
exchange (either natural or, if necessary, agency-managed) between
subpopulations. This overarching NRM recovery goal is stepped-down by
State. The step-down recovery target requires Montana and Idaho to each
maintain at least 10 breeding pairs and at least 100 wolves by managing
for a safety margin of at least 15 breeding pairs and at least 150
wolves in mid-winter. In Wyoming, the step-down recovery target is at
least 10 breeding pairs and at least 100 wolves primarily within the
State's jurisdiction while the YNP and the Wind River Indian
Reservation provide the remainder of the buffer above the minimum
recovery goal. Our recovery and post-delisting management goals were
designed to provide the NRM gray wolf population with sufficient
representation, resilience, and redundancy for their long-term
conservation. After evaluating all available information, we conclude
that the best scientific and commercial information available indicates
the population will remain viable following delisting if the recovery
targets continue to be met.
Monitoring and Managing Recovery--In 1989, we formed an Interagency
Wolf Working Group (Working Group) composed of Federal, State, and
Tribal agency personnel (Bangs 1991, p. 7; Fritts et al. 1995, p. 109;
Service et al. 1989-2009, p. 1). The Working Group conducted four basic
recovery tasks (Service et al. 1989-2009, pp. 1-2), in addition to the
standard enforcement functions associated with the take of a listed
species. These tasks were: (1) Monitor wolf distribution and numbers;
(2) control wolves that attacked livestock by moving them, conducting
other nonlethal measures, or by killing them (Bangs et al. 2006, p. 7);
(3) conduct research and publish scientific publications on wolf
relationships to ungulate prey, other carnivores and scavengers,
livestock, and people; and (4) provide accurate science-based
information to the public and mass media so that people could develop
their opinions about wolves and wolf management from an informed
perspective.
The size and distribution of the wolf population is estimated by
the Working Group each year and, along with other information, is
published in an interagency annual report (Service et al.
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1989-2009, Table 4, Figure 1). Since the early 1980s, the Service and
our cooperating partners have radio-collared and monitored
approximately 2,000 wolves in the NRM region to assess population
status, conduct research, and to reduce/resolve conflict with
livestock. The Working Group's annual population estimates represent
the best scientific and commercial data available regarding year-end
NRM gray wolf population size and trends, as well as distributional and
other information.
Recovery by State--At the end of 2000, the NRM population first met
its overall numerical and distributional recovery goal of a minimum of
30 breeding pairs and more than 300 wolves well-distributed among
Montana, Idaho, and Wyoming (68 FR 15804, April 1, 2003; Service et al.
2011, Table 4). Because the recovery goal must be achieved for 3
consecutive years, the temporal element of recovery was not achieved
until the end of 2002 when 663 wolves and 49 breeding pairs were
present (Service et al. 2003, Table 4). By the end of 2010, the NRM
wolf population achieved its numerical and distributional recovery goal
for 11 consecutive years (Service et al. 2001-2008, Table 4; 68 FR
15804, April 1, 2003; 71 FR 6634, February 8, 2006). By the end of
2010, the NRM gray wolf population included approximately 1,651 wolves
(566 in Montana; 705 in Idaho; 343 in Wyoming; 16 in eastern
Washington; 21 in eastern Oregon) in 111 breeding pairs (35 in Montana;
46 in Idaho; 27 in Wyoming; 1 in Washington; 2 in Oregon). Distribution
at the end of 2010 is illustrated in Figure 2. Populati