Rodents are usually black, gray, or brown in color. Their fur can be either glossy and sleek or dull and bristly. Most have small black eyes, rounded ears, and some sort of tail. Many also possess sharp claws on their feet that help them climb trees or dig tunnels. Gifted climbers, like mice and rats, have long tails, while burrowing rodents, such as voles and gophers, have short tails.