Lesser Black-backed Gull 2CY, May 10 2017, Katwijk, the Netherlands.
Intermedius-type 2CY bird. Complete moult not started yet, all replaced feathers were included in the post-juvenile moult on the wintering grounds. Advanced moult in inner wing-coverts, all tertials and several inner scecondaries, and outermost and central rectrices (this bird has too many tail-feathers?).
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