Chimpanzees use around seventy gesture types in the wild, and they produce gestures intentionally, aiming to affect the behaviour of the recipient. Chimpanzee gestures are used to request a variety of behaviour, from begging for food to requesting s.ᴇ x.
Each chimp holds a rank—or place—in the community. Usually, one male holds the top rank. He leads ꜰɪɢʜᴛs against predators, or against chimpanzees from other territories. Sometimes the group tries to scare strangers away by calling loudly and charging ꜰɪᴇʀᴄᴇly. Chimps have even been known to ᴀᴛᴛᴀᴄᴋ and ᴋɪʟʟ strangers. But within their own community, chimps are much gentler with each other, although they do sometimes quarrel. After a quarrel, often within half an hour, they make up by holding a hand out to the other and kissing. The tension in the community is relieved, and the others offer consolation with pats and hugs.
Chimps also have many signals to tell each other how they feel, to ᴡᴀʀɴ each other of ᴅᴀɴɢᴇʀ, and to report where food is. Chimpanzees often share their food with each other. When a chimp finds a tree with lots of fruit, he may call the others to a feast. While eating, chimps grunt to show how happy they are.
Chimps eat mostly fruit, leaves, seeds, and flowers. But they will also feast on ants, honey, eggs, caterpillars, birds, and, sometimes, small animals, even—rarely—other chimps.
Gestures, noises, and facial expressions are all used—even a grin can have many meanings: genuine happiness, nervousness, or a smile that says “Let’s be friends again.”
While the males are displaying, the females and babies stay out of the way. Male chimps become so excited that they could ʜᴜʀᴛ somebody without meaning to.
Male chimpanzees shake branches, throw rocks, and charge each other in a display meant to ɪɴᴛɪᴍɪᴅᴀᴛᴇ others and demonstrate superiority. The male that puts on the ꜰɪᴇʀᴄᴇst display becomes (or remains) the leader. Eventually, another chimp—or a group of chimps—will challenge and overthrow him.