Done also during social play, in solicitation of play and courtship. Cf. kick. Bonobos stamp while running, but not while sitting. Pikas Stomp for captive bonobos. 2. See video. S stamp bipedal Stamp sole on ground, buttress, tree trunk, wall of house, or another while upright. Component of charging display. Adolescent males stamp with alternate feet on ground in courtship. Bonobos of Wamba stamp bipedal in courtship, but not in charging display. 3. See video. stamp in invitation Nishida Invitation stamp. Mainly youngsters, lightly stamp on ground while watching potential playmate, inviting social play or alloparental care. Bipedal or quadrupedal. Absent in bonobos of Wamba. 7. See video. stamp other Goodall: Stamping on a victim is a major component of withinspecies fighting, and can result in severe bruising