5CY Herring Gull Green YBMD – 20170710

Images of fifth-calendar year Herring Gull Green YBMD, seen in the gull colony of IJmuiden Forteiland, the Netherlands, 10 July 2017.

Compared to the images taken on June 4, inner primaries P1 to P3 are now fully replaced, while P4 and P5 are missing/growing.

Also note the worn white primary tips and the brown colouration on the primary coverts, indicating its young adult age.






For more images of this gull in all ages, see Gull Research.

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