I heard back from the Maine Department of Conservation and Recreation about the gull. 

Captured 12/7/09 at Kmart, Holyoke, MA
Captured using a rocket net baited with bread and crackers
Adult male ring-billed gull
Yellow wing-tags: A206
Federal band: 0994-03494
Released on site


If there are any other sightings of the gull, please send information to:
Dan Clark
Natural Resources Section
MA Department of Conservation and Recreation
Division of Water Supply Protection
80 Beaman Street
West Boylston, MA 01583