That's odd- I was always taught that if you saw a lot of crows - they were rooks, and if you saw a solitary rook, it's a crow!
Although it's a pic from Nat Geo I think it's photoshopped because if you look closely there are mirror images of crows and also it's a magic eye picture of the Pope playing poker with Colonel Gaddafi and Wayne Rooney.....
Looks like a scene from Hitchcock's "The Birds"... :eek:
Blimey, i would have said Starlings not Crows...
This reminds me of my what do you call a group of geeks thread!