Great apes in zoos require complex social environments, large spaces, and cognitively stimulating enrichment to meet their exceptional intelligence and social needs.
Great apes present the most challenging welfare case in zoo management because their cognitive and social complexity is closest to human levels. Their capacity for boredom, frustration, grief, and social longing is well-documented. Welfare in captive great apes requires not just physical space but social complexity — appropriate group composition, stable social hierarchies, and opportunities for genuine social learning and play. The conservation justification for keeping great apes in zoos is contested given their endangered status in the wild and the difficulty of reintroduction. Sanctuaries offering large natural enclosures may offer better welfare than traditional zoo settings for rescued individuals.