Michael Durham / Mountain Beaver (Aplodontia rufa) at night, not truly a Beaver but a Muskrat-like rodent, Mt Hood National Forest, Oregon

Michael Durham / Mountain Beaver (Aplodontia rufa) at night, not truly a Beaver but a Muskrat-like rodent, Mt Hood National Forest, Oregon

Joel Sartore / Photo Ark / Mountain beaver (Aplodontia rufa pacifica) male eating a fern leaf, Wildlife Center of the North Coast. Captive.