Habitat: High flow volume water, densely vegetated banks, non-turbid water
Average Lifespan: 8-9 years
Diet: Fish, invertebrates, frogs
The adult Northern River Otter in Montana weighs around 20 pounds and measures close to 47 inches long. Its thick, powerful tail makes up nearly 20 inches of that length. Small eyes and ears, a broad, flattened head, long cylindrical form, and four webbed feet suit it for its semiaquatic life. In addition, its fur, dark brown on top, silvery or paler brown on the throat, chest, and underside, has special qualities. The long guard hairs remain pliable in very cold weather, and the dense underfur traps air to insulate it in water. The Northern River Otter can dive to 45 feet and stay underwater for some minutes. It is more nocturnal in summer and its eyes reflect a faint amber glow at night. Its short, muscular legs move surprisingly well on land, and is usually seen traveling in pairs. It has 36 teeth.
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