Tag Archives: larus argentatus

1CY Leucistic European Herring Gull, brown aberration – September 2018

The ones that that didn’t make it- IJmuiden breeding season 2018

Comparison of underwing primary patterns in Dutch adult Herring Gulls and Lesser Black-backed Gulls – May/June 2018

Request for observations of our IJmuiden gulls ringed in season 2018

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