title: A case report of a novel type of stick use by wild chimpanzees.
abstract: We have found evidence that wild chimpanzees used stout sticks to dig into one end of a decayed fallen trunk from the side and a long stick with a frayed end to dig into or brush its stump, in the Moukalaba Reserve, Gabon. This type of stick use by wild chimpanzees has not been recorded in any habitat. This finding should contribute to future studies and discussions of variations in tool use and cultural processes among wild chimpanzees.
authors.affiliation: Primate Research Institute, Kyoto University, 41 Kanrin, Inuyama, Aichi 484-8506, Japan. nishimur@pri.kyoto-u.ac.jp
authors.forename: Takeshi
authors.initials: T
authors.lastname: Nishimura
authors.forename: Naobi
authors.initials: N
authors.lastname: Okayasu
authors.forename: Yuzuru
authors.initials: Y
authors.lastname: Hamada
authors.forename: Juichi
authors.initials: J
authors.lastname: Yamagiwa
mesh_terms: D000818:Animals; D000835:Animals, Wild; D001522:Behavior, Animal; D005681:Gabon; D002679:Pan troglodytes; D013672:Technology; D014197:Trees