Capybaras are the world largest rodents and highly social semi-aquatic animals. Meeting their social and aquatic needs in captivity is essential for good welfare.
Capybara welfare in zoos depends primarily on social group integrity and water access. These highly social animals form strong bonds within their groups and show clear stress responses when separated from conspecifics. Housing capybaras in pairs or small groups below species-typical social unit size produces social deprivation that compromises welfare. Water access is equally important: capybaras thermoregulate through wading and swimming, and in warm climates denied water access they suffer heat stress. Appropriately managed groups with pool access, vegetation cover for retreat, and species-appropriate feeding show capybaras as calm, socially engaged animals with rich behavioral repertoires. The relatively modest welfare investment of larger groups and water features yields significant welfare returns.