Indiana’s river otter records follow the state’s water, reaching 41 counties from the marshes of Willow Slough and Crosley fish and wildlife areas to the streams of Hoosier National Forest and Morgan - Monroe State Forest and the wet edges of Indiana Dunes National Park. Jackson and Jennings counties in the south hold the heaviest concentrations.
Built for the water
An otter’s life is organized around fish, crayfish, and frogs taken underwater, and its body is fitted to that work: a streamlined frame, webbed feet, dense waterproof fur, and valves that close the ears and nostrils on a dive. Family groups travel miles of shoreline, denning in abandoned beaver lodges and bank burrows, and their worn mudslides on steep banks often announce them before the animals show themselves.
A winter animal, if anything
Unlike most Indiana mammals, the otter’s record peaks from January through March. Otters stay active all winter, fishing open leads and traveling over ice, and snow turns their tracks and slides into signatures a secretive summer animal never leaves. The warm months keep them in thick riverside cover, where far less gives them away.
Status in Indiana
NatureServe ranks the North American river otter S5, Secure, in Indiana, and the species is native to the state. USGS NAS does not list it as nonindigenous here.
