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World's Longest Mule Deer Migration: Red Desert to Hoback

December 22, 2022

In 2016, researchers in Wyoming discovered the world's longest migration of mule deer. A doe fitted with a GPS tracking collar migrated 242 miles one way. She is known as Deer 255. Each summer, she lives in the heart of the Greater Yellowstone Ecosystem, but travels far into Wyoming's sagebrush sea and high desert ecosystem for winter.