Evidence-based enrichment programs significantly improve zoo animal welfare. Understanding what the science says helps zoos prioritize effective interventions.
Not all enrichment is equal — poorly designed programs can be ineffective or even cause frustration. Evidence-based enrichment requires matching enrichment type to species-specific behavioral needs, providing novelty and complexity, and monitoring for behavioral response. Social housing is consistently the most powerful enrichment for social species. Physical complexity — climbing structures, varied substrates, water features — matters especially for active species. Zoos that conduct systematic enrichment evaluation and adapt programs based on animal response achieve the best welfare outcomes.