I have an anecdote. When you play golf at many seaside courses, such as Pebble Beach, they tell you to make sure and store your valuables carefully, zipped in your bag. They will tell you how seagulls fly into unattended carts and make off with expensive watches, such as Rolex Oysters, then drop them onto the rocks.
The story that went with that pic was as amazing. These birds had stolen thousands of dollars in quarters from the carwash. I suppose a gull might think an oyster (rolex or otherwise) worth investigating but what would any of them do with money?
No idea. I heard of that story as a friend of a friend owned the carwash, or so he claimed. Bizarre. We once had a deranged jay ruin both rearview mirrors on our van. The only way to make him stop attacking his reflection was to cover them up whenever the car was in the driveway.
(Diana, goddess of the hunt)