Here is a short summary about Beavers:
There are two existing species - North American and Eurasian.
They are the second-largest living rodents. 
Physically species of Beaver can vary in terms of fur colour but they all have webbed back feet, hand-like front feet and flat scaly tails. Long chisel-like incisors are a key feature. 
Beavers can be found in freshwater habits. 
They are herbivores.