Visit to the gull colony of IJmuiden – 20190329

Images taken during a visit to the gull colony of IJmuiden Forteiland, the Netherlands, on March 29, 2019, as part of our research project.

Shown are European Herring Gulls, Lesser Black-backed Gulls, and (presumed) hybrid Lesser Black-backed Gulls x Yellow-legged Gulls.

Click for a larger image.

European Herring Gulls

Female YBUF

Male YBMD with female YCPZ

Male YCKZ with female YCHL

Male YCKZ

Female YCHL

Lesser Black-backed Gulls

Female YBJX

Male YBRK

Male YATJ

(Presumed) Hybrid Lesser Black-backed Gulls x Yellow-legged Gulls

Male YBWP

Now in its 5th calendar year. Note the sub-adult markings in the upper and lower wing.

Compare with the images as a 4th-calendar year.

Male YCAF

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