Chimpanzees have some of the most complex social needs of any zoo animal. Group composition, space and enrichment quality determine welfare outcomes fundamentally.
Chimpanzees kept in undersized groups or inadequate spaces show high rates of aggression, psychological distress and stereotypic behaviour. Single-sex or single-individual housing is a welfare crisis for a species that lives in complex multi-generational communities. Leading zoos provide naturalistic outdoor areas of several thousand square metres with climbing structures, termite mounds and foraging enrichment that occupies multiple hours daily. Social introductions between groups require careful managed integration with appropriate escape routes and monitor periods.