Sometimes they raid caches of squirrels and other mammals. When frightened, the southern red-backed vole gnashes or chatters its teeth and makes a chirplike bark. It often shows aggressive territorial behavior toward its own kind, as well as toward other mice and voles. It is about five times bigger than most mice and voles. This aquatic rodent swims and dives with ease.
Muskrats often build mounds of mud and vegetation in shallow wetlands.
It inhabits woodlands, bogs, and other open, moist areas. Seldom Seen The following species are uncommon in Minnesota. Some are at the edge of their range. Others have suffered habitat loss or changes. All but the rock vole are listed as species of special concern.