Two species on Earth are known to use hook-shaped tools: humans and New Caledonian crows. And now, for the first time, the people have caught the birds using them on camera. There are crows all over ...
EDINBURGH, Scotland, Dec. 23 (UPI) --New Caledonian crows are one of the most industrious species on the planet. They've been known to build and utilize a range of tools. The more scientists watch ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results