National Geographic : 2010 Feb
Tool Craft To fish for a high-protein snack, a male chimp has arrived at a termite mound carrying a fishing probe and puncturing stick. Though termite fishing has been observed in chimp populations throughout Africa, the chimps of the Goualougo have their own set of tricks passed from generation to generation. The chimp has ripped a hard, straight stick from a tree (for the puncturing stick, left). In his mouth he holds a softer stem he has prepared by pulling its end through his teeth to split the last six inches into a fringe. He uses the bigger stick to puncture the termite mound (right, top and middle). Finally, he threads the second tool into the hole and, if he has executed the strategy properly, bugs will be clinging to the bristles when he pulls the probe out of the mound (bottom right).