Lesser Black-backed Gull sub-adult, May 22 2014, Katwijk, the Netherlands.
Graellsii type bird. Adult-like flight feathers but still with many immature patterned feathers. Mirror on P10, dark centres on secondaries. Note random replaced primaries, looking fresh.
![](../lbbgjanmay/images/2014b/lbbgsubad_2284.jpg)
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