This adult black-backed gull was associating with similarly shaped and sized Great Black-backed Gulls. The bird was very similar to an adult Great Black-backed, but had an obviously lighter gray mantle. The best possibility for explaining this bird's appearance is that it is an aberrant Great Black-backed gull with a leucistic plumage.
These photos were taken with a Canon Rebel XSi Digital Camera with a 100-400mm zoom lens.
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