Images taken during a visit to the gull colony of IJmuiden Forteiland, the Netherlands, on April 29, 2019, as part of our research project.
Shown are European Herring Gulls, Lesser Black-backed Gulls, and a (presumed) hybrid Lesser Black-backed Gull x Yellow-legged Gull.
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European Herring Gulls
Partner of YBAU.
With partner YCAP.
Male YBRD and female YBUW
Lesser Black-backed Gulls
Male White N0LV
Ringed while wintering in Malaga, Spain some years ago.
Showing a mix of leucistic and sub-adult plumage each year.
Showing black on all primaries.