Unlike chimpanzees, who can be very noisy, gorillas are very quiet animals. When a gorilla is upset, he might cough or bark. Chestbeats are made for all sorts of reasons, from a gorilla feeling good on a sunny day, to a gorilla showing off, to a gorilla warning someone that he's there and watching. Little baby gorillas learn to chestbeat and juveniles often chestbeat as a part of their play and games. A really upset gorilla may scream, much like high-pitched human scream.
Gorillas live in family groups.
Gorillas are skilled hunters of other animals. Gorillas love to play. Gorillas are aggressive and ferocious. Gorillas are gentle and peace-loving animals. King Kong was a real gorilla.