IJmuiden Gull Research Team season 2020 review

Our review of the 2020 season describing the results of our research into Lesser Black-backed Gulls, Herring Gulls, Common Gulls, and Oystercatchers at IJmuiden Forteiland in the Netherlands is now available.

It includes:

  • The total numbers of nests and their content found, total breeding pairs, number of colour rings fitted.
  • An overview of our hybrid gulls (presumed Lesser Black-backed x Yellow-legged) and the presence of a mixed pair consisting of a male Herring Gull and a female Lesser Black-backed Gull.
  • The results of where our juvenile and adult Lesser Black-backed Gulls that are fitted with a GPS-logger have spent the winter.
  • Updates on various ongoing smaller research projects.
  • Results of the Oystercatchers that are breeding on the island.
  • Updates on the Common Gulls breeding on the island.

The report is available as a PDF and can be downloaded via the following links:

Dutch version/Nederlandse versie

English version


The IJmuiden Gull Research Team,
Fred, José, Maarten


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