wild chimpanzees in feeding upon wood-boring ants. J Hum Evol 11:7399 Nishida T, Hiraiwa-Hasegawa M Responses to a stranger mother-son pair in the wild chimpanzee: a case report. Primates 2:113 Nishida T, Hiraiwa-Hasegawa M Chimpanzees and bonobos: cooperative relationships among males. In: Smuts BB, Cheney DL, Seyfarth RM, Wrangham RW, Struhsaker TT Primate societies. University of Chicago Press, Chicago, pp 1 5177 Nishida T, Hiraiwa-Hasegawa M, Hasegawa T, Takahata Y Group extinction, female transfer in wild chimpanzees in the Mahale National Park, Tanzania. Z Tierpsychol 7:284301 Nishida T, Hosaka K Coalition strategies among adult male chimpanzees of the Mahale Mountains, Tanzania. In: McGrew WC, Marchant LF, Nishida T Great ape societies. Cambridge University Press, Cambridge, pp 114134 Nishida T, Hosaka K, Nakamura M, Hamai M A within-group gang