Primates in zoos have complex social needs that require careful group management to support welfare, with social deprivation causing severe psychological harm.
Primate welfare in captivity is fundamentally social welfare. The psychological suffering of a socially deprived primate - evident in stereotypic behaviour, self-harm and depression - represents some of the worst welfare outcomes documented in zoo animals. Well-managed primate groups with appropriate composition, space and enrichment can achieve good welfare, but this requires sustained expertise and commitment. Group introductions are high-risk events requiring careful management. Long-lived species require social planning over decades. Primate sanctuaries that prioritise social complexity over visitor access often achieve the best welfare outcomes.