In rural England I've heard of that for magpies (which are corvids I think), but never crows themselves. Someone I know from Scotland sings a song with the sam

In rural England I've heard of that for magpies (which are corvids I think), but never crows themselves. Someone I know from Scotland sings a song with the same sort of pattern but about crows proper (like 'Ten green bottles' but for crows - "the last craw wasna' there at a'").