Herring Gull and Lesser Black-backed Gull portraits – May/June 2018
Lesser Black-backed Gull primary pattern comparison – May/June 2018
Herring Gull primary pattern comparison – May/June 2018
Lesser Black-backed Gull pair with 6 chicks – 20180611
4th-calendar year Lesser Black-backed Gull comparison – 20180518
Adult Lesser Black-backed Gull Green YBJB – 20180514
6CY Lesser Black-backed Gull Green YBMT with retarded plumage – 20180409
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
