Probably very good. They've been known to communicate highly specific dangers to other crows and supposedly understand recursion:

https://www.scientificamerican.com/article/crows-perform-yet...

I haven't read it yet but there's also a sci-fi book about intelligent society of crows (Children of Time series):

https://en.wikipedia.org/wiki/Children_of_Memory_(novel)

"It's the same story the crow told me, it's the only one he knows . . . "

the first book in the series is amazing. Unfortunately it goes down from there. Could not finish the third one ( Crow one )

Third one was interesting but out of place. It didn't move the story forward. Maybe a little bit (I don't want to spoil the ending).

That's disappointing to hear, I do own all three and plan to hopefully finish them before the years end.

> supposedly understood recursion

TIL the average corvid is notably smarter than the average compsci undergrad