Endangered Species
Mountain-Prairie Region

Grizzly Bear Recovery

Yellowstone Ecosystem Archive

Human Fatality Investigation Reports
Wallace Board of Review Report (released Jan. 2012)
Matayoshi Investigation Team Report (released Sept. 2011)
Soda Butte Campground Attacks Investigation Team Report (released August 2010)
Evert Investigations Team Report (released July 2010)
Evert Investigations Team Recommendations (released July 2010)

Distinct Population Segment Actions

On March 22, 2007, the U.S. Fish and Wildlife Service (Service) announced that the Yellowstone Distinct Population Segment (DPS) of grizzly bears is a recovered population no longer meeting the ESA’s definition of threatened or endangered. This DPS has increased from estimates as low as 136 individuals when listed in 1975 to more than 500 animals as of 2006. This population has been increasing between 4 and 7 percent annually. The range of this population also has increased dramatically as evidenced by the 48 percent increase in occupied habitat since the 1970s.  Yellowstone grizzly bears continue to increase their range and distribution annually and grizzly bears in the Yellowstone area now occupy habitats they have been absent from for decades. Currently, roughly 84-90 percent of females with cubs occupy the Primary Conservation Area (PCA) and about 10 percent of females with cubs have expanded out beyond the PCA within the DPS boundaries. Grizzly bears now occupy 68 percent of suitable habitat within the DPS boundaries and may soon occupy the remainder of the suitable habitat.

Intensive monitoring of the population and its habitat will continue so that managers can continue to base management decisions on the best available scientific information.  The Yellowstone DPS represents a viable population which has sufficient numbers and distribution of reproductive individuals so as to provide a high likelihood that the species will continue to exist and be well distributed throughout its range for the foreseeable future. The State and Federal agencies are committed to implementing the extensive Conservation Strategy and State management plans.  They have formally incorporated the habitat and population standards described in the Conservation Strategy into the six affected National Forests' Land Management Plans and Yellowstone and Grand Teton's National Park Compendiums.  This commitment coupled with State wildlife agencies' approved grizzly bear management plans ensure that adequate regulatory mechanisms are in place and that the Yellowstone grizzly bear population will not become an endangered species within the foreseeable future throughout all or a significant portion of its range.  Therefore, based on the best scientific and commercial information available, we are finalizing the delisting of the Yellowstone grizzly bear DPS.  More information on this action and other post-delisting management documents are available below.

Background Information

Summaries and Responses to Public Comments Received
Habitat-based Recovery Criteria

Conservation Strategy

Proposed Rule

Revised Methods to Estimate Population Size and Sustainable Mortality

Supplemental Information


Last updated: July 7, 2015