This is an unusually pale marinus in juvenile plumage with the size not much bigger than argentatus and with a rather slim and elongated profile but yet still a marinus.
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| Great Black-backed Gull (Larus marinus), 1k, 22.8.2009, Østerby Harbor, Læsø. |
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| Next to a juvenile European Herring Gull. |
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| Next to a juvenile European Herring Gull and some normal sized Great Black-backed Gulls. |
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