LBBG 1cy C91E, July 14 2002, Dintelhaven - Maasvlakte, the Netherlands.
Ringed a few days ago in the colony: left C91 red, right E yellow. All wing-coverts, tertials and scapulars are very neat, without obvious wear in the fringes. This year birds were ringed with a combination of white E or yellow E and a colour ring with a letter + digit combination.
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