monkey against substrate with both arms. Kills prey and simultaneously intimidates followers of meat-holder. Also seen at Ta. 8. See video. knock with one arm Hold, lift, and knock object against substrate with one arm. Adolescent male, Cadmus, knocked colobus carcass with one hand, holding branch with other. Kills prey and simultaneously intimidates followers of meat-holder. Also seen at Ta. 8. See video. See also video knock down with both arms. knuckle-knock See rap. knuckle walk See walk quadrupedal on knuckles. K L laugh See play-pant. lead Mature male or female, and especially adolescent male, leads sexual partner into undergrowth or higher in tree to avoid interference by more dominant males. See also consort. Cf. herd. Seen in bonobos. See video. L leaf-clip See clip leaf. leaf cushion