Capybaras are the largest existing rodents and are found along the Amazon in South America.
They are excellent swimmers and can remain underwater for a few minutes at a time. This helps them to escape from predators. When necessary, capybaras are capable of spending an entire night underwater. They keep their nose near the surface of the water to be able to breathe.
Capybaras have barrel-shaped bodies with reddish brown fur and webbed feet. Adult capybaras can grow as high as 4.3 feet. They are herbivores, and like other rodents, their front teeth keep growing to replace the old worn ones.
Though now extinct, it is believed that there once existed capybaras which were the size of grizzly bears.