Gulls in NW Europe

(last update: September 25, 2011 )

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argentatus / argenteus

graellsii / intermedius

michahellis

marinus

Herring Gull (argenteus) adult, September 12 2012, IJmuiden, the Netherlands.

P4 fully grown, P8-P10 still old. PMS=28. Old greater primary coverts on P8-P10 plain grey indicate full adult.