Mandrills are the world's largest monkey species, with elaborate social structures and visual signaling that require specific management approaches in zoo settings.
Mandrill welfare in zoos requires managing the complex social dynamics of a highly hierarchical species. Dominant male mandrills control group access to resources and females — in captive groups without appropriate space and resource distribution, subordinate individuals face chronic stress from displacement. Multiple feeding stations spatially distributed across the enclosure reduce resource competition and allow subordinate animals to feed adequately. Foraging enrichment on the ground — buried food, scatter feeding, puzzle mounds — addresses their natural floor-level foraging behavior. Visual signals including their remarkable facial coloration are social welfare indicators: chronically stressed subordinate males show color fading as testosterone drops, providing a non-invasive welfare indicator for keepers. Large multi-species exhibits that combine mandrills with compatible species can provide additional behavioral enrichment.