Mandrills are omnivorous and opportunistic feeders. They eat a wide variety of plant matter, including fruits, leaves, flowers, stems, roots, and bark. They also eat insects, small mammals, and birds.
Fruits and leaves
Fruits are the most important part of the mandrill's diet. They eat a wide variety of fruits, including figs, bananas, oranges, mangoes, and guavas. They also eat leaves from a variety of plants, including the leaves of the fig tree, the banana tree, and the mango tree.
Insects and other animals
Mandrills also eat insects, such as ants, termites, and beetles. They will also eat small mammals, such as mice, rats, and squirrels. They will sometimes even eat birds.
Water
Mandrills drink water from rivers, streams, and ponds. They will also drink water from puddles and other sources of standing water.