5CY Lesser Black-backed Gull Black/Blue 3P with sub-adult marking in secondaries – 2018

Rare example of a young adult Lesser Black-backed Gull with sub-adult markings in the outer secondary S2 in both wings.

Black/Blue 3P was ringed as a pullus at Maasvlakte, Rotterdam, the Netherlands, in July 2014 and was observed during the breeding season of 2018 at the gull colony of IJmuiden Forteiland, the Netherlands, where I took these photos.

Many thanks to Roland-Jan Buijs of Buijs Eco Consult for ringing this bird and for providing the ringing details.

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