Mandrill
The mandrill is an omnivore. It usually consumes plants, of which it eats over a hundred species. It prefers to eat fruits, but will also eat leaves, lianas, bark, stems, and fibers. It also consumes mushrooms and soil. Carnivorously, mandrills mostly eat invertebrates, particularly ants, beetles, termites, crickets, spiders, snails, and scorpions. It will also eat eggs, and even vertebrates such as birds, tortoises, frogs, porcupines, rats, and shrews. Mandrills likely will eat larger vertebrates when they have the opportunity, such as juvenile bay duikers and other small antelope. Large prey are likely killed with a bite to the nape with the mandrill's long canines. One study found the mandrill's diet was composed of fruit (50.7%), seeds (26.0%), leaves (8.2%), pith (6.8%), flowers (2.7%), and animal foods (4.1%), with other foods making up the remaining (1.4%).
Dull-mantled antbird
The diet of the dull-mantled antbird is composed of insects and other arthropods; recorded prey items are spiders (Araneae), cockroaches (Blattaria), beetles (Coleoptera), crickets (Gryllidae), woodlice (Oniscidea) and indeterminate insect larvae. It feeds as an individual, as a pair or in small family groups, moving close to the ground – usually not more than 10 cm above the forest floor –, every now and then jumping up to a low branch to take a look around and immediately descending again. Its prey is usually caught by gleaning, pecked up from between the leaf litter or, after a jump up or a short flutter, from vegetation. It rarely rummages through the leaf litter to search for prey; rather, it will observe its surroundings tensely, beating down its tail forcefully and slowly raising it up again, and then strike directly at something that has attracted its interest. Small prey is devoured immediately; larger animals are beaten vigorously on branches to make them easier to swallow. The species will occasionally follow army ants but it is not an obligate ant-follower like some other true antbirds or ground antbirds (Formicariidae); while it may join mixed-species feeding flocks on occasion, it usually prefers to forage on its own or with its family.