Bossou, Guinea: a newly observed tool-using behavior. Primates 3:489500 Zamma K Leaf-grooming by a wild chimpanzee in Mahale. Primates 43:8790 Zamma K A chimpanzee trifling with a squirrel: pleasure derived from teasing? Pan Afr News 9:911 Zamma K Rejecting a bit of meat to get more. Pan Afr News 12:810 Zamma K A louse egg on a leaf. Pan Afr News 13:810 Zamma K, Fujita S Genito-genital rubbing among the chimpanzees of Mahale and Bossou. Pan Afr News 11:58 Appendix List of Copyright Owners of Video Clips Behavior abuse abuse carcass adduct penis aggress aggress in sexual frustration aggress, redirected aid in locomotion alliance allow alpha male approach approach and withdraw arise arrive attack attack concertedly avoid avoid fallen log backstroke balance bark bark, infantile beat sole with