Until Charles Darwin observed finches at work in the Galapagos, many members of our own species had believed that tool-usage was a uniquely human ability/trait.
The known list of non-human tool-users is now enormous.
It includes many mammals (not only primates), birds, fish, cephalods, reptiles, and insects.
One of them is an Australian raptor which deploys rocks to crack emu eggs.
You may be surprised to know that the pictured individual did not learn the technique from his or her parents, nor did this captive bird’s human “keepers” train him or her to do it.
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