Yes I have heard that people used to do it with Crows.
I'll tell you a story, completely true.
Our Cockatoo's, took this picture of one a few months ago.
View attachment 158909
Are fantastic talkers and really easy to teach.
About 20 yrs ago when I was younger and a bit too free with my mouth I was detecting for gold in a mountain area where they are in large numbers and nest. I was doing ok too getting bits there but they would keep landing in the huge gum trees near me and screech their heads of. They are really loud. I couldn't hear the signals properly. So I'd hit the tree trunks with my pick and yell at them to shut up and not so politely go away.
It was a good spot and I went there quite a number of times over a couple of weeks.
One day toward the end I hear a voice. Take off my headphones but nope, nothing. Keep detecting and hear it again. Take them off, nothing. Odd, only one way in and I didn't pass anyone or hear a car.
Detecting and hear it again only this time it keeps talking. A cockatoo above me swearing and telling me where to go. The exact things I'd been yelling at them.