For reference: images of (presumed) hybrid Herring Gull x Lesser Black-backed Gull ringed in 2021 as Green YDJB as part of our project in the IJmuiden Forteiland colony, the Netherlands, and seen in subsequent years. The grey mantle is darker than that of our breeding European Herring Gulls (Larus argentatus argenteus), and paler than our …
Images of (presumed) hybrid Herring Gull x Lesser Black-backed Gull Green YDJB
Gulls to the Horizon 