[earthlymission.com]
Crows are capable of recursion, something we used to think only humans could do.
Corvids and parrots are very smart birds.
As farmers in the 1800's and until the mid 1950's, my family had great respect for the intelligence and tight-knit community behavior of crows, including their use of language...a cry of 'Human approaching' is not the same as 'human with potential weapon approaching,' in fact a fun thing to do is hover on the edge of a field they are in & pick up a stick! Apparently it is shaped like a gun to them......
Same as rooks where I grew up in England.