2CY Lesser Black-backed Gull Green YBSJ – 20150802

Images of 2nd-calendar year Black-backed Gull Larus fuscus graellsii (Dutch intergrade) Green YBSJ, taken in the harbour of IJmuiden, the Netherlands, 2 August 2015.

It is in active moult with P1 to P5 fully replaced and P6 nearly fully grown. A moult gap can also be seen in the secondaries and in the tail.








July 2014

Green YBSJ as a juvenile while being ringed in the gull colony of IJmuiden (Forteiland), close to where the above photos were taken.



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