At Fort De Soto this past Saturday I had a very fun time watching a Herring Gull with its prey. It would fly up about 30 ft in the air, drop its prey and then come down and inspect it. I saw it do this about 5-7 times before I had to move one. He was working pretty hard at getting his morsel out, but I suspect it will take him a long time, since all he had to drop his prize on was compacted sand.
I've read that crows and gulls both exhibit this behavior, but I've never been able to photograph it before. If I had more time, it would have been fun to watch this for a while longer to see if he was able to extract his prize.