Cameras have revealed how "armed" chimpanzees raid beehives to gorge on sweet honey.
Scientists in the Republic of Congo found that the wild primates crafted large clubs from branches to pound the nests until they broke open.
The study is published in the International Journal of Primatology.
Crickette Sanz, from the Max Planck Institute of Evolutionary Anthropology in Leipzig, Germany, said: "The nutritional returns don't seem to be that great - but their excitement when they've succeeded is incredible, you can see how much they are enjoying tasting the honey."
Footage courtesy of Crickette Sanz/David Morgan