Zoo Animal Welfare

Zoo Drill and Mandrill Welfare in Captivity

Drills and mandrills are highly social primates requiring large, complex groups and environments to support their welfare in captivity.

Key Facts

Both species live in large, complex social groups in the wild
Mandrills have the most pronounced sexual dimorphism of any primate, with complex social hierarchies
Insufficient group size is a primary driver of poor welfare indicators in captive drills and mandrills
Environmental complexity including foraging opportunities significantly improves welfare outcomes
Both species are conservation-threatened, giving captive populations conservation value

Welfare Considerations

Drill and mandrill welfare in zoos depends on maintaining sufficient social group complexity. These species evolved in large, structured social groups where hierarchical relationships and coalitions are central to individual wellbeing. Small captive groups or inadequate social management leave these animals unable to express fundamental social behaviours. Investment in larger groups, appropriate sex ratios, and complex foraging environments is essential.

What You Can Do

Support zoos with large, well-managed drill and mandrill groups
Learn about drill and mandrill social ecology to evaluate captive welfare
Donate to conservation programmes protecting wild drill and mandrill populations in Africa