Mandrills are among the most socially complex primates, and zoo management must accommodate their complex hierarchies and behavioral needs for good welfare.
Mandrill welfare in zoo settings is highly sensitive to social management because their complex hierarchical system requires appropriate group size and composition to function naturally. Small groups of mandrills cannot express the full range of natural social behavior, while poorly composed groups may experience destabilizing aggression without the normal social buffering of larger populations. The visual complexity of mandrill social signaling — through coloration, posture, and facial expression — reveals an animal whose social life is richly meaningful, and whose welfare depends substantially on having appropriate social context for that life. Enrichment that simulates the foraging complexity of the wild diet engages mandrill cognitive capacity and occupies behavioral time in welfare-positive ways.