Physical enrichment for zoo primates must provide for their complex locomotor, cognitive, and social needs to support genuine welfare.
Primate behavioral welfare depends fundamentally on having sufficient physical complexity to support natural locomotion and exploration. Exhibits that provide flat surfaces and simple structures prevent the three-dimensional movement for which primates are physically and neurologically adapted. Cognitive deprivation in intelligent primates causes boredom and frustration that manifests as stereotypies and abnormal behavior. The investment required to provide high-quality primate enrichment - including fresh browse, novel puzzle feeders, and complex structural environments - is substantial but represents the ethical minimum for species with these cognitive and behavioral needs.