As regular CFZ-watchers will know, for some time Corinna has been doing a column for Animals & Men and a regular segment on On The Track... particularly about out-of-place birds and rare vagrants. There seem to be more and more bird stories from all over the world hitting the news these days so, to make room for them all - and to give them all equal and worthy coverage - she has set up this new blog to cover all things feathery and Fortean.

Sunday, 24 December 2017

Crafty crows know what it takes to make a good tool


New study provides surprising insights into how crows manufacture their hooked foraging tools

Date:  December 7, 2017
Source:  University of St. Andrews

Biologists at the University of St Andrews have discovered how New Caledonian crows make one of their most sophisticated tool designs -- sticks with a neatly-shaped hooked tip.

New Caledonian crows are the only species besides humans known to manufacture hooked tools in the wild. Birds produce these remarkable tools from the side branches of certain plants, carefully 'crafting' a crochet-like hook that can be used for snagging insect prey.

The study, published in Current Biology today (7 December), reveals how crows manage to fashion particularly efficient tools, with well-defined 'deep' hooks.


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