Herring
Gull DKC 4086164 2cy (argentatus), December 23 2010, IJmuiden, the Netherlands.
The
complete moult in argenteus is finished by October and overlaps with the partial autumn moult which starts in September and often include scapulars, a few inner wing-coverts and upper tertials. In this bird, the upper tertials, inner greater coverts & one central median covert have been replaced recently.
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