Hawks and Crows mortal enemies

[emcguffie]

7. Did you see that news recently about crows?

I can't remember precisely, but they were able to understand, or identify, or something, symbols. I think it was that numbers were placed on top of containers or something, to indicate how many goodies were under that whatever-it-was. And the crows learned that a larger number meant more goodies. SOmething like that, quite amazing, even for our very-bright bird friends, crows.