softly while showing play face. Absent in bonobos of Wamba. 5. See video. slap other Done during play, play invitation, charging display or fighting. Juvenile male, Xmas, slapped back of adult male while grooming him. Pikas Slap for bonobos. See video. S 172 smack lip slap self Nishida et al. Slap belly. Slap own belly, chest, or thigh. Five-yearold juvenile male, Cadmus, struck belly with right hand to make drum-like sounds, while hanging from branch by left arm, even when alone. Solo play or response to approach of human observer. Other juveniles, Xmas and Michio, later began regularly to slap belly or chest in intimidation display and solicitation of play, while hanging in tree, standing bipedal or walking bipedal on ground. Male infant, Caesar, slapped belly and thigh