cliff Similar to human rock-climbing without any artificial climbing equipment. 3. See video. climb down See descend. climb vertical Hunt et al.s Flexed-elbow vertical climb. Climb woody vine or small tree by alternately using palmar surfaces of four limbs. See video. climb vertical, extended elbow Hunt et al. Extended-elbow vertical climbing. Extend arms around trunk of large tree and propel upwards by simultaneous thrusting or walking movements of feet. See video. cling Goodall: Gripping a tree trunk or branch with hands or hands and feet. An infant clings to mothers or others belly, back, arm or leg. Also in bonobos. See video. clip leaf by hand Tear leaf by hand, separating midrib and leaf-blade. At Mahale, adolescent male, Cadmus, used to solicit mating. Customary at Budongo, and habitual