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Declaration by Dr. David Mattson for litigation contesting the 2017 removal of ESA protections for Yellowstone grizzly bears

This declaration describes the special nature of Yellowstone grizzly bears and the on-going threats posed by environmental change and management protocols proposed by state management agencies.

Letter by Dr. David Mattson & 72 other scientists to Governor Matt Mead of Wyoming

This letter describes the threats posed to Yellowstone grizzly bears by environmental change and the problematic methods for managing mortality being proposed by the state of Wyoming.

Declaration by Dr. David Mattson for litigation contesting livestock management plans for the Upper Green River area in Wyoming

This declaration describes the threats posed to grizzly bears by US Forest Service plans for managing livestock in the Upper Green River area, with particular emphasis on the problems posed by allowing 72 bears to be killed during the next 10 years.

Testimony submitted by Dr. David Mattson to the Senate Committee on Environment & Public Works

This testimony describes a framework for and approach to promoting coexistence between grizzly bears and people, emphasizing institutions, strategies, and reform of state wildlife management.

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Open Letter to Montana's Governor & Director of FWP

This letter addresses numerous short-coming in both the constitution and implementation of Montana's recently adjourned Grizzly Bear Advisory Council--prominent of which was the politicization of science by the State. (Dr. David Mattson)

Declaration by Dr. David Mattson for litigation contesting routing of the Pacific Northwest National Scenic Trail (PNNSC)

This declaration describes the threats posed to grizzly bears by US Forest Service plans to route the PNNSC through the best remaining habitat available to the highly imperiled Yaak grizzly bear population.

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Piikani Nation Treaty



Find out everything you ever wanted to know about the biology and ecology of grizzly bears. Authored by world-renowned bear biologist Dr. David Mattson, this site summarizes and synthesizes in beautiful graphic form the science of grizzly bears.


Find out how much Native Americans care about the grizzly bear, with a Grizzly Treaty that has been signed by more than 270 tribes, as well as numerous traditional societies and leaders. The document has become a symbol of international unity in defense of sovereignty, spiritual and religious protection, and treaty rights. 


For an in depth and comprehensive look at the ecology and demography of grizzly bears in the northern US Rocky Mountains, along with all the research relevant to conservation of these bears, see Mostly Natural History of the Northern Rocky Mountains.


GOAL is a coalition of nearly 50 tribes  (and counting) who object to the federal and state plans to delist grizzly bears prematurely and allow trophy

hunting of this sacred being.

GOAL advocates for the tribes'

legal right to meaningful consultation and also for the reconection of tribal peoples to their traditional homelands

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