• Capibaras have sweat glands on the surface of fur-covered skin areas, an unusual feature among rodents. They lack underfur, and their guard hairs are barely different from the rest of their fur.
• The capibara's premolars and molars lack roots and grow throughout its life. Its incisors are wide and have a longitudinal groove on the outer surface.

The capybara’s body height ranges from 17.8 centimeters to 4.5 meters; its body length varies from 1 to 1.35 meters. The species' mass falls between 35 and 66 kilograms, with the adult stage exhibiting a mass of 35 to 50 kilograms and a body length of 1 to 1.3 meters. During the embryonic stage, the body mass is from 1 gram to 2 kilograms; in the pup stage, the body mass ranges from 1.5 to 8 kilograms, and the body length is from 30 to 60 centimeters.