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SEWELLEL (MOUNTAIN BEAVER)

AMNH

American Museum of Natural History

American Museum of Natural History
New York, NY, United States

Neither a beaver nor a high-mountain dweller, the sewellel is a rather singular animal. It’s the last living member of a once-successful family of rodents called the Aplodontiidae. The sewellel is a “living fossil,” showing primitive skeletal features that other rodents have lost. Its kidneys are also unusual: they are inefficient at maintaining the body’s water balance. Thus the sewellel needs to live close to water so it can drink a lot—a third of its weight in water per day.

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  • Title: SEWELLEL (MOUNTAIN BEAVER)
  • Creator: AMNH
  • Location: Bernard Family Hall of North American Mammals at the American Museum of Natural History
American Museum of Natural History

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