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Study: “Movement ecology” studies document increasing inability of animals to move across landscape

HELENA, Mont. — Snow comes early to the Teton mountain range, and when it does the white-bottomed pronghorn that live here get the urge to move.


Following an ancient rhythm, they migrate more than 200 miles to the south, where the elevation is lower, winter is milder and grass is easier to find. Come the spring green-up, they make the second half of the round trip, returning to the Grand Teton National Park.


https://www.nytimes.com/2018/02/19/science/migration-animals-west.html

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