The apes include gibbons, gorillas, orangutans, chimpanzees, and bonobos Bonobos were once called pygmy chimpanzees, but are now considered a different species. Apes have larger brains than monkeys and do not have tails. Apes are generally omnivores that feed primarily on fruit, seeds, and insects, though chimpanzees are known to hunt and eat monkeys and small mammals. Humans are primates too, and are closely related to apes, especially the chimpanzee. Like chimpanzees, humans are omnivores.