Herring Gull KYAK2cy (argenteus), December 24 2010, Amsterdam, the Netherlands. Picture: R Altenburg.
Bird from Vliehors, SOVON study site Vlieland, ringed by Peter de Boer on 15 July 2009.
Central medians, inner greater coverts and upper tertials replaced in partial autumn moult, again with a very 2nd gen like pattern, not adult-like grey based.
|