<human>:  Can you tell me the difference between European and American beaver species?
<bot>: The main difference between European and American beaver species is their size. The European beaver is larger in size than the American beaver, with an average body length of up to 39 inches and a weight of up to 66 pounds. The American beaver is smaller, with an average length of up to 34 inches and a weight of up to 46 pounds. European beavers also have a characteristic white-tipped tail that is not found in American beavers. Additionally, the tail of the American beaver is flatter than the disc-shaped tail of the European beaver.