Capybaras — the world's largest rodents — are semi-aquatic, highly social grazers from South American wetlands. Meeting their need for water access, large social groups, and extensive grazing space is central to good zoo welfare.
Capybara welfare in zoos requires attention to three core needs: social grouping, water access, and grazing opportunity. Capybaras should never be housed as singletons — social contact is a fundamental requirement for psychological wellbeing in this highly gregarious species. Group composition should be stable; frequent introductions of unfamiliar individuals cause chronic stress. Pool access must be sufficient for the group to immerse comfortably — not merely a shallow paddling feature — since water use is both thermoregulatory and behavioural. Grazing opportunity on real grass, supplemented by hay and browse, more closely meets nutritional and behavioural needs than pellet-based feeding alone. Exhibits should provide retreat areas where capybaras can escape visitor attention, as their status as prey animals means sustained exposure to unfamiliar stimuli causes ongoing low-level stress. Their calm, approachable temperament makes them popular in interactive exhibits, but handling programmes must be carefully managed to avoid creating chronic stress.