A very poor photo, but I was a long way off and this is greatly cropped. Earlier, I'd found a dead pigeon, missing its head. Awhile later, coming back to the spot, I heard a raven calling and from some distance saw it fly down to the pigeon, pick it up and fly away with it. I post this photo only because it shows how big a raven really is... the pigeon is not an insubstantial bird but it looks small here (you have to look closely to see it... the big grey mass in the raven's bill).