Most numerous at foothill elevations. Primarily feed on fish, crayfish, and other crustaceans. Swim, dig on bottom of watercourses, search and pursue on land to obtain prey.
River otters drink water.
Suitable habitat consists of riparian and other wetland vegetation associated with a large, permanent water source. Mostly nocturnal, but frequent diurnal activity. Travel distance is highly variable, and related to food supply, suitable habitat, and inherent wandering. No information available. Individuals establish scent posts using their urine, feces, and musk.