Lesser Black-backed Gull graellsii EM7 10CY, March 18 2002, Maasvlakte - Missouriweg, the Netherlands (51.59N,04.02E).
Adult male ringed, left orange EM7. Ringed as pullus July 06 1993 at this location. Those older orange rings start to become dark brown-red after a few years.
Bathing in small pools contaminated by coal dust result in the sooty appearance.
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