Primates in zoos require sophisticated behavioral enrichment to meet their exceptional cognitive and social needs. Inadequate enrichment causes measurable welfare suffering in these intelligent animals.
Primate welfare in zoo settings is directly expressed through behavioral indicators that are clearly visible to observers. Well-managed primates with appropriate enrichment, social groups, and complexity show active engagement with their environment, normal social interactions, and wide behavioral repertoires. Poorly managed primates in inadequate environments show stereotypic behaviors including self-injurious behavior, regurgitation and reingestion, abnormal social behavior, and passive inactivity. The evidence connecting environmental enrichment to primate welfare is among the strongest in zoo biology, and the failure to provide adequate enrichment represents a clear welfare failure for highly intelligent, socially complex animals.