The Paca are three species of terrestrial, herbivorous rodents of South America. They are fairly large for a rodent, measuring between 50-77 cm in length. Habitat is rainforest and cloud forest, and Paca are generally found near water. She is a skilled swimmer, and can remain submerged for up to 15 minutes. During the daytime she mostly rests, foraging in the morning and evening, or sometimes during the night. The three species are fairly similar in appearance, and they also resemble the not-closely related Pacarana, which is sometimes known as the "false paca".
Pacarana can be distinguished by their slightly furrier face and their tail, which is thick and furry. The Paca's tail is almost non-existant.