Request for observations of our IJmuiden gulls ringed in season 2018
Category Archives: Herring Gull
Larus argentatus, Larus argenteus
Adult Herring Gull Green YCHH with pseudo mirror, Thayeri pattern and suspended primary moult – 20180716
Herring Gull and Lesser Black-backed Gull portraits – May/June 2018
Herring Gull primary pattern comparison – May/June 2018
Primary pattern variation in adult Herring Gull Green YBKC from 2015 to 2018
Suspended primary moult in adult European Herring Gulls Larus argentatus argenteus of the Dutch colony of IJmuiden Forteiland
Uitgestelde handpenrui bij volwassen Zilvermeeuwen Larus argentatus argenteus uit de IJmuiden Forteiland kolonie
Marked Birds Database update: plans for the coming months
Marked Birds Database – Version 1.16.1 available
Status update on the presence of pseudo-mirrors and non-isolated mirrors in IJmuiden-ringed adult European Herring Gulls
