Beavers are large, semiaquatic rodents native to the temperate Northern Hemisphere. There are two extant species in the genus Castor, the North American beaver ("Castor canadensis") and the Eurasian beaver ("C. fiber"). Beavers are the second-largest living rodents after the capybaras. They have stout bodies with large heads, long chisel-like incisors, brown or gray fur, hand-like front feet, webbed back feet and flat, scaly tails. The Eurasian beaver has a more elongated skull with a more triangular nasal bone opening, lighter fur color and a narrower tail. The animals 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.