Snow goose flash mob. They start coming, as if out of nowhere. Suddenly you are surrounded by thousands of bleating waterfowl. The mob eats, poops, and leaves.
Starling ugly mob. Can gobble a block of suet down to the bones in a matter of minutes.
Wigeon panicked mob. Post-prandial reverie interrupted by a low-flying harrier.
Snow geese are terrifically organized. They can outmob anyone.