There are four species in this family. They are found in rainforests in Central and South America.

Three-toed sloths are about two feet in length and have round heads, short tails, and small ears. They have long, thick, shaggy fur with grooves in it.

Three-toed sloths have grayish-brown or yellowish-brown fur, but they can look green because algae get in the grooves in their fur.  Their fur grows from their stomach and curls around to their back.

Three-toed sloths have long arms and legs. Their arms are longer than their legs. They have three toes on their front paws and five toes on their rear paws. They have three long, curved claws on each paw.

Three-toed sloths live in trees. They hang upside down and move very, very slowly. They are herbivores and eat leaves, buds, fruit, and twigs. They are nocturnal and spend most of their time sleeping.