Requirement of guides has reduced snowmobile stress on Yellowstone wildlife

A technical document, part of the current draft environmental impact statement on Yellowstone snowmobile use tells that the requirement that snowmobilers have guides has reduced, but not eliminated, the stress snowmobiles create on the wintering wildlife.

Bald Eagles are the species that show the most stress, followed by elk and coyotes. While the grooming of roads affects bison, especially those bison deep the in the Park, the bison was the animal that showed the lowest stress response of those studied.

Story in the Jackson Hole News and Guide. By Corey Hatch.


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Dr. Ralph Maughan is professor emeritus of political science at Idaho State University. He was a Western Watersheds Project Board Member off and on for many years, and was also its President for several years. For a long time he produced Ralph Maughan’s Wolf Report. He was a founder of the Greater Yellowstone Coalition. He and Jackie Johnson Maughan wrote three editions of “Hiking Idaho.” He also wrote “Beyond the Tetons” and “Backpacking Wyoming’s Teton and Washakie Wilderness.” He created and is the administrator of The Wildlife News.

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