herring gull

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A common gull (Larus argentatus) of the Northern Hemisphere having gray and white plumage with black wingtips.

from The Century Dictionary.

• noun One of several gulls of large size, having the mantle pearl-blue, the primaries crossed with black and tipped with white, the bill yellow with a red spot on the gonys, and the feet yellow or flesh-colored.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A common, large seagull, Larus argentatus, having a white and gray body and a yellow bill with a red spot.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun large gull of the northern hemisphere