Manufacture and use of tools in wild Sumatran orangutans

  title={Manufacture and use of tools in wild Sumatran orangutans},
  author={Carel P. van Schaik and Elizabeth A. Fox and Arnold F. Sitompul},
The manufacture and use of tools in great apes may provide insights into the evolution of hominid cognitive abilities [1] and technology [2]. So far, the common chimpanzee (Pan troglodytes) is the only nonhuman species known to show extensive manufacture and flexible use of tools in nature [2], suggesting that these skills arose only in the chimpanzee-hominid clade [2, 3], around 7 million years ago [4]. Here we report on the habitual manufacture and use of tools in wild Sumatran orangutans… 
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