Ring-billed gull

First-winter

ring-billed gull

ring-billed gull

ring-billed gull

ring-billed gull

This bird is in more juvenile plumage, and has an almost uniformly dark bill.

ring-billed gull

Second winter

ring-billed gull

ring-billed gull

ring-billed gull

Adult

ring-billed gull

ring-billed gull

ring-billed gull

ring-billed gull

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