They’ve done elaborate intelligence tests with crows that clearly show tool usage—like a crow will use a piece of twig to get at a treat that he can’t access otherwise.
Yep. I saw one just like that. It was a seven step puzzle process.
Yep- I’ve seen some videos- pretty amazing
If a person treats crows well, they will start to bring gifts to that person. Trinkets like pop top from cans and whatever they find that they think is proper.
They also recognize people who are kind to them.
https://www.youtube.com/watch?v=HWXe7Js6GnI