Crows Could be the Smartest Animal Other Than Primates.
Chris Baraniuk.
www.bbc.com.
Dec 11, 2019.
New Caledonian crows make hooked tools from soft twigs to scoop insects out of holes. Other animals that use tools: chimpanzees, parrots, alligators and crabs.
The crows found the desired stems even when they had been disguised with leaves from a different plant species.