Just after World War II, the people of McCall, Idaho, found themselves with a problem on their hands. McCall was a lovely resort community in Idaho's backcountry with mountain views, a sparkling lake, and plenty of forests. People rushed to build roads and homes there to enjoy the year-round outdoor activities. It was a beautiful place to live. And not just for humans. For centuries, beavers had made the region their home. But what's good for beavers...