thrown by human. When chimpanzees of K group were given bananas and sugarcane, some chimpanzees of both sexes skillful at catching piece of sugar cane with both hands, even when in tree. Behavior developed without training, in response to human throwing to chimpanzees. change nipple During sucking, infant changes nipple from right to left or vice versa. Plooijs Change nipple. See video. charge Goodall: Fast run directed toward another individual. Bonobos charge too. See video. charging display See display, charging. chase Goodall Chase. Run after fleeing individual, seeking to grab it in aggression, play or hunt. Chaser usually dominant to chased, but not always. Chasing play between adults is slower. Goodall Sometimes, a subordinate individual, screaming or perhaps uttering waa barks, chases after his/her aggressor as the latter