See video. drag branch Goodall Branch dragging: A branch broken from a tree, or one lying on the ground is dragged by one hand during a charging display Finally, branch is typically thrown forward. Widely known across Africa: Ndoki, Bossou, Ta, Lop, Gombe, Mahale, Kibale, Budongo and Goualougo. In bonobos of Wamba, branch-dragging displays have many more behavioral elements than those of chimpanzees. Late adolescent male bonobos use display to tease and to challenge males higher in rank. Bonobos sometimes drag branch while walking without stamping or vocalizing. Bonobos of Lomako also drag branch. See video. drag by hand Goodall: Drag by hand along ground individual, branch, palm frond, large food object, etc. Shown in aggression, threat, play, and maternal solicitude. Plooijs Drag. Bonobos of Wamba drag only