Crows ‘Hooked’ on Fast Food
|01/22/2018||Posted by BusinessMediaguide.Com under General World News||
Some New Caledonian crows craft hooked tools out of branched twigs, and Scottish biologists have discovered why – the birds can extract food from cracks and crevises several times faster than by using straight twigs.
“It is a painstaking sequence of behaviors,” explains Professor James St. Clair, from the University of St. Andrews, the lead author of the new study in the current issue of Nature Ecology & Evolution. “Crows seek out particular plant species, harvest a forked twig, and then, firmly holding it underfoot, carve, nibble and peel its tip, until it has a neat little hook.”
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