There is more than one way to crack an oyster : identifying variation in Burmese long-tailed macaque (Macaca fascicularis aurea) stone-tool use by Tan, Amanda, Tan, Say Hoon, Vyas, Dhaval, Malaivijitnond, Suchinda, Gumert, Michael David

“…Point hammering was significantly more associated with sessile foods, smaller tools, faster striking rates, smoother recoil, unimanual use, and more varied striking direction, than were face and edge hammering, while both point and edge hammering were significantly more associated with precision gripping than face hammering. …”
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