Individual gulls observed in multiple countries
Category Archives: Herring Gull
Larus argentatus, Larus argenteus
IJmuiden Forteiland gull research: breeding season 2018 report
IJmuiden Forteiland gull season 2018
1CY Leucistic European Herring Gull, brown aberration – September 2018
Marked Birds Database Manual – Working with Markers and Marker Events
The ones that that didn’t make it- IJmuiden breeding season 2018
Images of European Herring Gull Green YBXB – 2015 and 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
