I was killing some time along the river in Lowell, MA early on a Sunday morning, and some walkers were out feeding the birds. There was a flock of well over 100 birds; seagulls, pigeons, and ducks, swarming around the path along the river. This one bird flew right  in front of me on his way to a landing on a snow bank along the path. I created multiple exposures from the one frame, then combined them to add some contrast and bring in a bit more detail.