Visit to the gull colony of IJmuiden – 20190415

Images taken during a visit to the gull colony of IJmuiden Forteiland, the Netherlands, on April 15, 2019, as part of our research project.

Shown are European Herring Gulls and Lesser Black-backed Gulls.

Click for a larger image.

European Herring Gulls

Male YADK

Female YBAZ

With a pseudo-mirror on P9 in the left wing (not present in 2018).

With partner YCAP:

Male YCAP

Female YBBA

Male YBBV

Female YBNZ

Female YBPT

Female YBUF

With partner YCMN.

Female YCHH

With thayeri-pattern on P9.

Male YCPK

Lesser Black-backed Gulls

Female YABC

With strikingly dark legs each year.

Male YAVH

Male YBDD

Compilation photo.

Male YBPH

Male YBZM

Fifth-calendar year.

Female YCKB

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