I’m a little frustrated with talking about birds as a class in this context. Crows are legendary for figuring things out.

Turkeys are also legendary. Like the farmer brings three of them out, chops the head of the first one off. The other two are still standing there. “Wow! Look what happened to Charley! I wonder what this line is for.”

“Birdbrain” may be wrong for corvids but too complimentary to turkeys.