Great Black-headed Gull (Ichthyaetus ichthyaetus)
by Dave Barnes
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Great Black-headed Gull (Gabbiano di Pallas)
by Daniele Occhiato
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Grote Mantelmeeuw / Great Black-headed Gull
by Arie Ouwerkerk
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Svarthuvad trut / Great Black-headed Gull
by Anders Blomdahl
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Pallas's gull, Great black-headed gull
by Christopher Plummer
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Great Black-backed Gull or something else?
by Nick Komar
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Great Black-backed Gull with yellow legs - Duxbury Beach - August 18, 2013
by Rick Bowes
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My Favorites
by Jonas Landolt
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Lake Nakuru National Park
by Dan Scheiman
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