Primates in zoos have complex cognitive and social needs that require sophisticated enrichment programs. Evidence-based enrichment improves welfare measurably and is now recognized as a core zoo welfare standard.
Primate behavioral enrichment is where zoo welfare science is most sophisticated and most directly applicable to welfare improvement. The evidence base for what enrichment works, why it works, and how to measure whether it is working is stronger for primates than for most other zoo species. This reflects both the cognitive complexity of primates and the long history of welfare research in this taxon. Enrichment programs that combine foraging challenges, social management, positive reinforcement training, and cognitive stimulation can produce measurably better welfare outcomes - lower stereotypy rates, higher activity diversity, and better behavioral indicators of positive states. The challenge is translating this knowledge consistently across all facilities holding primates, including those with fewer resources for enrichment development.