Explores the lives of chimpanzees and describes the differences between the two species - the common chimpanzee and the pygmy chimpanzee, or bonobo. It traces the daily life of chimpanzees as they travel, forage and socialize and examines the behaviours that characterise each stage of a young chimpanzee's development. It also looks at how male and female behaviour is controlled by the dominant hierarchy, particularly when it comes to mating strategies.