• Capibaras' front and molar teeth grow throughout their lives, compensating for wear from eating grass. Like other rodents, their front teeth grow continuously.
• Young are born with open eyes and can swim within a few days.

The capybara’s typical lifespan ranges from 11 years and 4 months to 18 years and 11 months, with a maximum recorded lifespan of 15 years and 1 month, and a theoretical lifespan between 7 years and 7 months and 15 years and 1 month; the species reaches sexual maturity from 1 year and 1 month to 1 year and 8 months. The young are born with their eyes open and begin walking immediately, and they progress through developmental stages beginning with the embryonic stage, during which the embryo develops inside the mother, receiving nutrients via the placenta and not feeding independently; following birth, the pup is covered in fur, can see, and is able to walk and swim, relying on its mother’s milk for nourishment. The adult stage begins at 1 year and 1 month and lasts up to 12 years, during which the capybara has fully grown, is capable of reproduction, and lives within a group.