Lesser Black-backed Gull 3CY, May 13 2014, Katwijk, the Netherlands.
3CY graellsii type bird. All flight feathers 2nd generation. Many wing-coverts replaced in the partial autumn moult, now plain grey. Grey scapulars create "saddle", contrasting with brown coverts. Complete moult not started: P1-P10 old 2nd generation.
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