woody vegetation Component of charging display. While standing bipedal, vigorously shake tree trunk of short tree/large horizontal branch/woody vine/ fallen trunk of tree/rock, back and forth with both hands, sometimes destroying the dead tree as result. Type of threat display and used also as courtship. Probably same as Goodalls Branch sway: The chimp vigorously sways a growing branch usually when standing on ones feet. During a charging display, a male may pause and sway branches. Plooijs Branch-sway. Absent in bonobos of Wamba. 5. See videos. swelling of sexual skin Female anogenital region begins to swell cyclically at about 7 years of age and shows maximal swelling from about 10 years of age. After adolescence, sexual skin shows tumescence, maximal tumescence and dutemescence over typical menstrual cycle of 35