Beavers (genus Castor) are large, semiaquatic rodents of the Northern Hemisphere. There are two existing species: the North American beaver (Castor canadensis) and the Eurasian beaver (C. fiber). Beavers are the second-largest living rodents, after capybaras, weighing up to 30 kilograms (66 lb). Beavers have stout bodies with large heads, long chisel-like incisors, brown or gray fur, hand-like front feet, webbed back feet, and tails that are flat and scaly. The two species differ in skull and tail shape and fur color. Beavers can be found in a number of freshwater habitats, such as rivers, streams, lakes and ponds. They are herbivorous, consuming tree bark, aquatic plants, grasses and sedges.
Given this text give me short summary about Beavers
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.