Images of Yellow-legged Gulls Larus michahellis and of gulls of other species but also with yellow legs.
All images were taken at the sand suppletion activities on the beach of Katwijk aan Zee, The Netherlands, 19 – 20 October 2013.
First-calendar year, fitted with a ring from Switzerland. No new wing coverts are visible yet.
Dark individual with still some juvenile scapulars and no replaced wing coverts.
Small individual (possibly female) with contrasting scapulars and no second-generation wing coverts yet.
Fourth-calendar year individual, aged by the presence of black in the primary coverts.
Sixth-year old individual, ringed in The Netherlands as Blue DB.
I have seen Blue DB on several occasions during the last couple of years, for more images see my Flickr page
Scandinavian Herring Gull
Adult Scandinavian Herring Gull Larus argentatus argentatus, identified based on its slightly larger size compared to local European Herring Gulls Larus argentatus argenteus, dull-yellow legs, extensive streaking on the head and in the neck, the dark-orange to red orbital ring, large mirrors on P9 and P10, and lack of black in the outer webs of the outer primaries.
Adult female, a strikingly small bird with dull yellow legs.