From very hungry I look at what monkey eats

The word "monkey" is a common-language term. It includes two rather different groups of primates. The big distinction is between Old World monkeys and New World monkeys. Some examples of monkeys are macaques, baboons, guenons and marmosets.

Old World monkeys: Cercopithecidae. Apes are the descendants of Old World monkeys.[4]
New World Monkeys: Platyrrhini or Ceboidea (same thing in effect)
Both these groups are in the infraorder Simiiformes. That infraorder also includes the great apes and man.