patterns vary individually. For example, one male stands erect and beats walls of research buildings with only one palm, another does so with two palms, third one with one fist, fourth one kicks with one foot, and fifth one pounds with both feet. See also kick and slap. D 4 dunk face Drumming reported from Kibale and Ta. Bonobos drum on buttresses, most often immediately after onset of traveling. Cf. beat chest. See video. D drum belly See slap self. dunk Immerse object in water without releasing it. Juvenile male, Michio, once dunked fruit in puddle, then sucked it. Adult male, Musa, dunked colobus skin in stream apparently to clean it. Wadge dipping observed at Ta. Absent in bonobos of Wamba. leaf-sponge is kind of dunking. See wash.