Play is often attributed to the actions of River Otters. And once you've observed them in the wild, you'd agree [February; St. Louis River, Fond du Lac, Minnesota]
River Otters do not go dormant in winter. They can often be found far from water too [April; Crex Meadows, near Grantsburg, Wisconsin]
River Otters are at home in both the water and on land. They love a good fish or crayfish dinner. This one popped up in one of the only open spots in the river. [March 11; St. Louis River, Riverside, Duluth, Minnesota]