4CY Lesser Black-backed Gulls Green Y.BDA and Green Y.BDC – 20150427

Images of Lesser Black-backed Gulls Larus fuscus graellsii (Dutch intergrade) in their 4th calendar year. Both were ringed in the gull colony of IJmuiden (Forteiland), the Netherlands in June 2012. Note how YBDA is much more evenly colored and therefore more adult looking than YBDA, but that YBDC has got a small mirror on P10 (in the right wing) whereas YBDA has no mirrors yet.

The images were taken in the gull colony of IJmuiden (Forteiland), the Netherlands on 27 April 2015.

Green Y.BDA

G-YBDA-20150427-5

G-YBDA-20150427-1

G-YBDA-20150427-2

G-YBDA-20150427-3

G-YBDA-20150427-4

G-YBDA-20150427-6

Green Y.BDC

G-YBDC-20150427-3

G-YBDC-20150427-1

G-YBDC-20150427-4

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