IJmuiden Gull Research Team season 2021 review

Our review of the 2021 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 number 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).
  • An update on the project by NIOZ and the University of Amsterdam who have fitted our juvenile and adult Lesser Black-backed Gulls with a GPS-logger.
  • A comparison using stable isotopes between the diet of our gulls at Forteiland and those at a similar colony at Texel.
  • Various other projects including research into bird flu.
  • Results of the Oystercatchers and Common Gulls that are breeding on the island.
  • Observations of other bird species and mammals.
  • An interesting insight into the beetles that are present on the island.
  • News about our presence on Dutch TV.

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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