Long-running rock-throwing sites hint at culture in Guinea-Bissau chimpanzees
Field researchers in Boé, Guinea-Bissau, observed wild western chimpanzees repeatedly throwing rocks at the same trees with pant-hoots, a behavior that has persisted at sites for over a decade and may reflect a cultural form of communication and durable stone-tool use. Data were collected with camera traps since the chimpanzees are unhabituated, and researchers highlight conservation concerns as mining threatens their habitat and the cultural materials these chimpanzees weave into their landscape.