Biologists With Drones and Peanut Butter Pellets Are on a Mission to Help Ferrets

Black-footed ferrets are the most endangered mammal in North America. Scientists in Montana are trying to save the ferrets by saving their main food source, prairie dogs. Kathryn Scott Osler/Denver Post via Getty Images hide caption toggle caption Kathryn Scott Osler/Denver Post via Getty Images Black-footed ferrets are the most endangered mammal in North America. [ ]
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