Experimental investigation of orangutans' lithic percussive and sharp stone tool behaviours | PLOS ONE
![Bornean Orangutan (Pongo pygmaeus wurmbii) - 'Siswi' sawing a piece of firewood, Camp Leakey, Tanjung Puting National Park, Borneo, Central Kalimantan, Indonesia Stock Photo - Alamy Bornean Orangutan (Pongo pygmaeus wurmbii) - 'Siswi' sawing a piece of firewood, Camp Leakey, Tanjung Puting National Park, Borneo, Central Kalimantan, Indonesia Stock Photo - Alamy](https://c8.alamy.com/comp/W7PMMY/bornean-orangutan-pongo-pygmaeus-wurmbii-siswi-sawing-a-piece-of-firewood-camp-leakey-tanjung-puting-national-park-borneo-central-kalimantan-indonesia-W7PMMY.jpg)
Bornean Orangutan (Pongo pygmaeus wurmbii) - 'Siswi' sawing a piece of firewood, Camp Leakey, Tanjung Puting National Park, Borneo, Central Kalimantan, Indonesia Stock Photo - Alamy
![Bornean Orangutan (Pongo pygmaeus wurmbii) - 'Siswi' sawing a piece of firewood, Camp Leakey, Tanjung Puting National Park, Borneo, Central Kalimantan, Indonesia Stock Photo - Alamy Bornean Orangutan (Pongo pygmaeus wurmbii) - 'Siswi' sawing a piece of firewood, Camp Leakey, Tanjung Puting National Park, Borneo, Central Kalimantan, Indonesia Stock Photo - Alamy](https://c8.alamy.com/comp/W7PMN1/bornean-orangutan-pongo-pygmaeus-wurmbii-siswi-sawing-a-piece-of-firewood-camp-leakey-tanjung-puting-national-park-borneo-central-kalimantan-indonesia-W7PMN1.jpg)
Bornean Orangutan (Pongo pygmaeus wurmbii) - 'Siswi' sawing a piece of firewood, Camp Leakey, Tanjung Puting National Park, Borneo, Central Kalimantan, Indonesia Stock Photo - Alamy
SPY IN THE WILD on NATURE | Spy Orangutan Saws Some Wood | PBS | Given the chance, orangutans can learn to use human tools. Tune-in tomorrow at 8/7c for #SpyintheWildPBS on
![Amazing footage captures orangutans using SAWS to cut tree branches & chimps hunting with handmade spears | The Scottish Sun Amazing footage captures orangutans using SAWS to cut tree branches & chimps hunting with handmade spears | The Scottish Sun](https://www.thesun.co.uk/wp-content/uploads/2017/01/nintchdbpict000295291952.jpg?strip=all&w=960)
Amazing footage captures orangutans using SAWS to cut tree branches & chimps hunting with handmade spears | The Scottish Sun
BBC News - Spy in the wild: Sawing Orangutan | Facebook | By BBC News | This is amazing! The Great Orangutan Saw Off. 😄 http://bbc.in/2jatJFe
![Amazing footage captures orangutans using SAWS to cut tree branches & chimps hunting with handmade spears | The Sun Amazing footage captures orangutans using SAWS to cut tree branches & chimps hunting with handmade spears | The Sun](https://www.thesun.co.uk/wp-content/uploads/2017/01/composite-gorillz.jpg?strip=all&w=750&h=500&crop=1)