Although forest-living chimpanzees commonly include vertebrate prey such as monkeys in their diet¹, savanna chimpanzees have been reported only to eat prosimians². New evidence from the recently-established Fongoli study site in Senegal suggests that chimpanzees there hunt green monkeys (Cercopithecus aethiops sabeus). The Fongoli community ranges over an area of at least 63 km² and based on fecal analyses, consumes a species of bushbaby found here probably Galago senegalensis.