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Each spring and fall – many deer, elk and pronghorn migrate throughout the west to escape deep snow and find forage. But an increasingly developing West continues to encroach on their turf. Now, U.S. Geological Survey, and other agencies, have mapped these routes to ease the pressure between trekking animals and people. ....

United States , Joe Riis , Hall Sawyer , Matthew Kauffman , Us Geological , Mule Deer Migration Project , Western Wyoming , Red Desert , Riis Wildlife Ecologist ,