Lesser Black-backed Gull graellsii NLA 5.473.746 3CY, September 15 2015, Boulogne-sur-Mer, NW France. Picture: Jean-Michel Sauvage.
Data pending. Bird ringed in the Netherlands, a continental graellsii population sometimes referred to as 'Dutch intergrades' between British graellsii and Scandinavian intermedius.
Complete moult: P6 fully grown, P9-P10 old 2nd gen. Lower tertials and several secondaries (visible tips) still old 2nd gen, brownish. Tail-feathers (except one pair) have been shed, growing 3rd gen.
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