Max Planck researchers found chimpanzees routinely fish for algae during the dry season in Bakoun, Guinea, using long and robust sticks as a tool

Chimpanzees often use tools to extract or consume food but which tools they choose for which purpose can differ depending on where they live. In 2010, researchers at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, initiated the ‘Pan African Programme: The Cultured Chimpanzee’ to characterize and understand the differences in chimpanzee behaviours in un- and poorly studied ape populations across Africa. This is how the researchers encountered a new behavioural variant: Algae fishing with long robust tools at a temporary research site in Bakoun, Guinea.