Preganacy is an interval of eight luner months. Behavior Chimpanzees are very intelligent animals. When one chimpanzee gives another a grooming , it expects the other one to return the favor. When caretakers at, research lab Atlanta's Yerkes Regional Primate Research Center, arrrive with food the chimpanzees hoot and holler and jump around almost like they are dancing. They think that this reduces tension.
Some times fight occur, but that is rare.
It usually breaks out with a chimp doesn't give up its food after recieving a grooming. After they fight, they usually hug, kiss, or make up in some other way. Communication Chimapnzees give a lot of varieties of facial expressions and gestures to keep in touch with each other. They seem to think that chimpanzees make up their own little grunts and noises that mean a certain thing. The chimp is the noisiest ape.