There are two species of large rodents in this family. Pacas are found in the forests of Central and South America.

Pacas weigh around 20 pounds. They have reddish-brown fur with rows of white spots.

They have very, very small tails; large heads; cheek pouches; and small, round ears. Their hind legs are longer than their front legs. They have three clawed toes on their rear feet and four clawed toes on their front feet.

Pacas use their clawed feet to dig burrows in stream and pond banks, at the base of trees, or among the rocks. Their burrows have more than one entrance.

Pacas eat fruits, nuts, seeds, and plants. They are good swimmers. Pacas live alone or in pairs.