Crows show off a new trick

The Week (US) - - 20 News -

New Cale­do­nian crows, whose prob­lem­solv­ing skills have long set them apart from other avians, can even as­sem­ble tools out of avail­able parts, a new study has found. Na­tive to the South Pa­cific is­land af­ter which they are named, the birds be­came fa­mous for their cog­ni­tive abil­i­ties in 2002, when a cap­tive crow gained ac­cess to a treat by cre­at­ing a hook from a wire. In the new study, eight crows were pre­sented with an as­sort­ment of dif­fer­ent-length cylin­ders. In­di­vid­u­ally, these sticks were too small to reach food that had been hid­den in a box. But four of the birds re­al­ized within five min­utes how to put two rods to­gether, cre­at­ing a pole that let them push the treat out of an open­ing in the con­tainer’s side. One bird even con­structed a four-rod

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