Pan Afr News 11:1012 OHara SJ, Lee PC High frequency of postcoital penis cleaning in Budongo chimpanzees. Folia Primatol 77:353358 Ohashi G Behavioral repertoire of tool use in the wild chimpanzees at Bossou. In: Matsuzawa T, Tomonaga M, Tanaka M Cognitive development in chimpanzees. Springer, Tokyo, pp 439451 Ohashi G Papaya fruit sharing in wild chimpanzees at Bossou, Guinea. Pan Afr News 14:141 Okayasu N Vocal communication and its sociological interpretation of wild bonobos in Wamba, Zaire. In: Ehara A, Kimura T, Takenaka O, Iwamoto M Primatology today. Elsevier, Amsterdam, pp 239240 Paquette D Fighting and playfighting in captive adolescent chimpanzees. Aggress Behav 20:49 5 Payne CLR, Webster TH, Hunt KD Coprophagy by the semi-habituated chimpanzees of Semliki, Uganda. Pan Afr News 15:1517 Peterson D, Ammann K Eating