Found in 1921, the heaviest beaver ever recorded weighed 110 pounds and was caught in Iron County, Wis. Adult beavers normally weigh between 30 and 60 pounds and can grow up to 35 to 46 inches long including a flattened 12- to 18-inch tail.
Beavers are considered the second-largest rodents in the world, and the largest in North America. Its wide, flat tail is covered with leathery scales and sparse, coarse hair. The hind feet are very large and contain five long, webbed toes, while front feet are small and dexterous, which allows them to carry a variety of objects.