Lesser Black-backed Gull 2CY, June 18 2017, Utrecht, the Netherlands.
Bird not ringed, no provenance on origin. Intermedius type 2CY bird.
Advanced post-juvenile moult on the wintering grounds. All scaps and most wing-coverts (except outermost coverts) replaced, as well the upper tertials. Moult continued in rectrices (except R4-R5 left. Secondaries and (probably all) primaries remained juvenile.
Bird migrated north in spring and now complete moult started: P2/P6, P3 growing.
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