Nutria have coarse yellow-brown to reddish-brown hair on their top coat, while their underfur is denser, soft, and gray in color. With triangular-shaped heads, small ears and eyes, and noticeable orange-tinted incisors, nutria look similar to large, stout rats. The rodent grows to an average of 2 feet in length and weighs as much as 20 pounds. They have longer hind legs than front, and their back feet contain four webbed digits and one free, while their front feet are not webbed at all. Unlike the similar looking beaver, nutria have long, round, nearly hairless tails and pronounced white whiskers.