Introduction to the special issue: Tool use among Ugandan forest fragment chimpanzees

Abstract

Version anglaise Chimpanzees are considered to be one of the most frequent tool users in the animal kingdom (McGrew, 1992). They usually use tools manufactured from natural materials, such as sticks, stones, leaves or grass, for obtaining food and for exploring their environment (including tools for extracting, probing, and pounding) (Whiten et al., 1999). Additionally, tools may be used in social contexts and for cleaning their bodies (Goodall, 1986). While tool use is widespread among chimp...