What drives Yellowstone's massive elk migrations?

ScienceDaily
Jun 14, 2019, 2:12 pm162 pts
Yellowstone's migratory elk rely primarily on environmental cues, including a retreating snowline and the greening grasses of spring, to decide when to make the treks between their winter ranges and summer ranges, researchers show. Their study combined GPS tracking data from more than 400 animals in nine major…

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