American herring gull

First winter - note barred uppertail coverts and largely blackish tail with faint spotting along edges in flight.

American herring gull

American herring gull

American herring gull

First winter (or is it 2nd?) - bird with a bill with pink base and dark tip.

American herring gull

American herring gull

Probably fourth winter plumage, with streaked head and in this bird black subterminal bill markings.

American herring gull

American herring gull

Adult, largely still in summer plumage.

American herring gull

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