Surviving winter can be tough for the wildlife of Yellowstone, and will this year’s weather favor predator or prey? Will the grizzlies that emerge early survive, and why are the wolves and Great Gray Owls in danger of starvation? Plus find out how Yellowstone’s unique geology affects the mighty bison.

Spring in Yellowstone brings new life and a break from the brutal temperatures of winter, but the dangers aren’t over. The wildlife families now face a torrent of water cascading down the mountains as the Great Thaw gets underway, and the beavers are in particular danger.