We see the gorilla and the orang outang. Then the chimpanzee of Africa, who seems to speak to us. He has a cage chum, a Malayan orang outang. The orang has small ears, because he lives in trees and has few enemies. The saki of Brazil is an extremely rare monkey, clad like an Eskimo. The tiny Brazilian marmoset has a savage countenance. Some of the monkeys register expression as well as any screen favorite. We see a baby Peruvian crying for its mother. Then a Cacaquc chewing tobacco, and an African baboon, a large and savage type. Only the Old World monkeys have cheek-pouches for storing food. A little pig-tailed monkey is seen packing them full.
—Moving Picture World synopsis