απο wiki : The Gelada is the only primate species that feeds primarily on grass.[94] Tarsiers are the only extant obligate carnivorous primates, exclusively eating insects, crustaceans, small vertebrates and snakes (including venomous species).[95] Capuchin monkeys, on the other hand, can exploit many different types of food, including fruit, leaves, flowers, buds, nectar, seeds, insects and other invertebrates, bird eggs, and small vertebrates such as birds, lizards, squirrels and bats.[57] The Common Chimpanzee has a varied diet that includes predation on other primate species, such as the Western Red Colobus monkey