• Castor canadiensis
• Largest rodent in North America
• Chiefly nocturnal
• Rich, brown, waterproof fur
• Huge front teeth
• Large webbed hind feet and powerful hind legs
• Naked, scaly, paddle-shaped, flat tail
• Fat layer minimizes heat loss in cold water
• Transparent eyelids protect eyes
• Weighs an average of 30 to 60 pounds
• Lives along streams and lakes
• Feeds on bark and new tree shoots
