rocking movements. Kanos Stamping run and Pikas Stomp for bonobos. See video. stamp water Juvenile female, Jiddah, while sitting, repeatedly stamped on small pool of water, as part of water play in stream. Adolescent male, Cadmus, bent branches onto water and stamped repeatedly on them as solo play. 9. See video. stand bipedal Plooij STB. Stand upright. Stance assumed when watching distant object or taking food from tall shrubs such as Ficus urceolaris. Mother may drop infant by almost standing bipedal. Cf. walk bipedal. Bipedal posture occurs in courtship, mixed with other elements, such as shake branch, thrust, leap, and stamp. Common in bonobos. See video. stand quadrupedal Stop walking and scan environment or wait for another, etc. Plooijs STQ. Common in bonobos. See video. stand quadrupedal heel