The crows that know how to make tools

Thinkers as diverse as Freud, Engels and Thomas Carlyle once pointed to the use of tools as defining behaviour of human beings. Then it was found that many animals also used them, from the "fishing sticks" of apes to the rocks dropped on ostrich eggs by Egyptian vultures. ... The young (crows of New Caledonia) instinctively seize twigs in their beaks and use them to retrieve food from crevices ...


 animal intelligence

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