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Northern Rockies

The Latest On: Northern Rockies

April 3, 2015 | Legal Document

Mattson Declaration: Yellowstone Grizzly Mortalities

Veteran grizzly biologist David Mattson documents that increasing grizzly bear mortalities are of particular concern because analysis of government grizzly bear conflict and mortality data shows a declining population trend for the Yellowstone-area population from 2007-2013.

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