Black-footed ferrets, weasel-like animals with distinctive dark bands around their eyes and black feet, are ruthless little hunters. At night, they dive into burrows in pursuit of juicy prairie ...

In the early 1900s, the United States was likely home to more than 5 million ferrets. But ferrets, which hunt prairie dogs for food and live in their burrows, were almost wiped out early in the 20th ...