in arms, on muddy terrain, or to initiate charging display. Susman et al.s Bipedal walk in bonobos. See video. See also video stand bipedal. walk in sloth position Hang underneath branch using all hands and feet or combination of any three and locomote forwards. At Mahale part of solo W walk lame 203 play by immature chimpanzees. Bonobos also travel in this posture, which Kano called Sloth-walk. See video. walk lame See limp. walk quadrupedal on backs of hands Rare solo locomotor play. 9. See video. walk quadrupedal on knuckles Goodall Knuckle walking, Plooij WAQ. Quadrupedal walk with knuckles on ground or large horizontal bough. Kanos Walk. See video. walk quadrupedal on palms Walk quadrupedal, with open palm on thin horizontal branch. Rare when walking on ground. Susman