ナショナルジオグラフィックのインスタグラム(natgeo) - 2月3日 02時48分

Biologist and lead of the Yellowstone Cougar Project @yellowstone_cougar_project, Dan Stahler @dstahler, waits on top of a ridge with two mountain lion tracking hounds, Sula and Junior, in the mountains of northern Yellowstone National Park. Following an eight-year gap in research on cougars, the cougar project was restarted in the winter of 2014 to monitor the dynamics and ecological influence of Yellowstone’s big cat, and the effects of predator diversity. iPhone photo by David Guttenfelder @dguttenfelder

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