Capybara live in Central and South America. They roam the swampy, grassy regions bordering rivers, ponds, streams, and lakes. Because capybaras are rodents, they share some common features with mice, squirrels, and porcupines. The most well-known of those features are probably those ever-growing front teeth. Capybaras use their long, sharp teeth for grazing on grass and water plants.

An adult capy can eat 6 to 8 pounds (2.7 to 3.6 kilograms) of grass per day! During the dry season, when fresh grasses and water plants dry up, capybaras eat reeds, grains, melons, and squashes. They also eat their own poop to get beneficial bacteria to help their stomach break down the thick fiber in their meals.

Capybaras usually live in small groups of about 10 individuals, made up of a dominant male, one or more females, one or more subordinate males, and several young. During the wet season, as many as 40 capys may be found together.