Which Is the Largest Rodent in the World?

Capybaras live near rivers, lakes and marshes across much of South America, from Panama to northern Argentina. They are semi-aquatic, with slightly webbed feet, and can stay underwater for up to about five minutes to hide from predators. They live in groups of typically 10 to 20 animals and graze on grasses and water plants. Like all rodents, their front teeth grow continuously and are worn down by chewing. An extinct relative, Josephoartigasia monesi, found in Uruguay, may have weighed around a tonne.