Primates are very diverse. Apes represent the most advance primates. The western lowland gorilla is found in tropical rainforests in eastern Nigeria, Cameroon, southwestern Central African Republic, Equatorial Guinea, the Congo, Gabon, and Cabina. The eastern lowland gorilla is located in small pockets of tropical rainforest areas in the eastern part of the Congo. Each troop, from 7-20 gorillas, is led by a silverback male who protects and keeps the group together.
Gorillas are typically quiet and gentle.
Males will beat their chests as part of a ritual that sometimes includes hooting and thumping on the ground. This behavior is not clearly understood but seems to reflect excitement. Grooming is done to reinforce dominance and submission within the gorilla troop.