A pair of Black-Headed Gulls facing away from each other and clearly showing sexual dimorphism for size

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A pair of Black-Headed Gulls (Chroicocephalus ridibundus) facing away from each other and clearly showing sexual dimorphism for size

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Size: 5334px × 3561px
Location: Two Tree Island, Leigh on Sea, Essex
Photo credit: © Nigel Sawyer / Alamy / Afripics
License: Licensed
Model Released: No

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