A large number of gulls, geese and ducks (95% Blacks) were quietly resting on the flats north of the Plymouth Town Pier and suddenly all the gulls (c. 200) rose noisily into the air followed almost immediately by the ducks and then the geese and brant; it was almost as if a shot had gone off. I looked for a leashless dog or the Peregrine that is being seen in the area, but saw neither, and as I widened my search for the cause, I looked north toward Nelson Park and saw a flock of 150 or so calidris (Dunlin & Sanderlings) zooming around and another 50-100 gulls as well. That's when I looked higher in the sky and saw a large (even at that distance) dark flat-winged bird drifting down the shoreline toward the pier. No question that it was a young Bald Eagle. I got this shot as it glided almost directly over my head in the pier parking area.