Stone-tool-assisted hunting by a wild monkey (Macaca fascicularis aurea)

We report anecdotal evidence for stone-tool-assisted hunting by a non-human primate. Wild Burmese long-tailed macaques (Macaca fascicularis aurea) in Laem Son National Park, Thailand, regularly consume crabs, processing them both with and without stone pounding tools. However, stone-tool-assisted capture of crab prey, prior to the processing for consumption, has yet to be reported. We observed a tool-using episode as part of the hunting process, and provide video evidence confirming Burmese long-tailed macaques as the first known non-human primate to hunt and subdue other animals with the aid of stone tools.