This River Otter Is Bracing for a Harsh Michigan Winter

It takes a special breed of animal to handle the Michigan winter—and the river otter is better prepared than most. But preparation is half the battle, and it starts with a roll in the snow to keep its fur coat insulated. The waters in the Upper Peninsula of Michigan freeze over fast in winter–and river otters need to work just as fast to keep holes open in the ice. If they close, the otters lose access to fish. (03:10)

Science Smithsonian Channel