Mandrills are the world's largest monkeys and among the most socially complex primates, requiring large, mixed-sex groups and complex environments to achieve good welfare in captivity.
Mandrill welfare in captivity is fundamentally constrained by space and social complexity requirements that are difficult to replicate in typical zoo settings. Wild mandrills live in massive groups with complex social networks; captive groups of fewer than 8-10 individuals may be insufficiently complex for normal social development and stress management. Subordinate individuals require refuge spaces to escape dominant animals. The terrestrial foraging nature of mandrills means barren concrete environments with little foraging opportunity cause significant frustration. Excellent facilities provide large outdoor areas with varied substrates, multiple feeding stations to reduce competition, and sufficient individuals to allow natural coalition formation. Mandrills are visually spectacular animals that attract visitors, providing incentive for quality exhibit investment.