5CY Herring Gull YCKL with sub-adult plumage – 20210412
Category Archives: Herring Gull
Larus argentatus, Larus argenteus
First visit to IJmuiden Forteiland colony of 2021 season and returning birds with GPS loggers
Eye close-ups of adult Herring Gulls and Lesser Black-backed Gulls – 20200529
Visit to the gull colony of IJmuiden – 20200511
IJmuiden Lesser Black-backed Gull GPS-project update: daily routines of returning adults
Visit to the gull colony of IJmuiden – 20200316
IJmuiden Lesser Black-backed Gull GPS-project update: wintering young and returning adults
Visits to the gull colony of IJmuiden May – July 2019
Marked Birds Database – Version 2.5.2 (fix) available
Preparing the Marked Birds Database for the new calendar year
