Author Archives: Maarten van Kleinwee

5CY Herring Gull YCKL with sub-adult plumage – 20210412

Marked Birds Database – Version 2.13.0 available

First visit to IJmuiden Forteiland colony of 2021 season and returning birds with GPS loggers

IJmuiden Gull Research Team season 2020 review

Marked Birds Database – Version 2.12.0 available

Filming Lesser-Blacked Gull YDDD in flight and matching it with its GPS data

Marked Birds Database – Version 2.11.1 available (fix for version 2.11.0)

The return of Lesser Black-backed Gull Green YAPC – 20200827

Marked Birds Database – Version 2.11.0 available

IJmuiden Lesser Black-backed Gull GPS-project update – 20200814