What is considered to be the juvenile 'white-winged gull' first seen at Queen Mother Reservoir (Berkshire, England) in February and then subsequently at Stewartby Lake (Bedfordshire) and Willen Lake (North Buckinghamshire) in early March and at Rainham Marsh (Essex) on 12 & 16-18 March reappeared at QMR two nights ago and was at Beddington Sewage Farm (Surrey) today (see images linked with the thread below)
This individual has dramatically changed its plumage between February and now and after writing it off as a hybrid back then (probably with North American Herring Gull influence), its appearance now far more resembles GLAUCOUS-WINGED GULL.
I would be most grateful if those of you very familiar with GWG would have a look at today's images and comment on whether this resembles West Coast birds at this time of year. It has always seemed too small in terms of structure and jizz
This winter has seen an exceptional influx of Arctic gulls into Western Europe, including record numbers of both Iceland and Glaucous Gulls in Iberia, the majority of which arrived just after a fierce winter storm arrived from the NW Atlantic (it also displaced several Snowy Owls and Gyrfalcons, Ivory and Ross's Gulls and a number of North American ducks, a Killdeer and an American Coot. We have already had an adult Glaucous-winged Gull in Cleveland in early January.
Looking forward to any feedback
Many many thanks
Here is my comments and shots (click on them for better sized images)
Half Moon Bay, California
Hybrid American Herring x Glaucous-winged we'd expect to show more of a dark tail band?
Southern California has also had a bit of a white-winged gull event winter this year too with excellent numbers of Glaucous and significantly more Glaucous-wingeds than usual. Seawatching reports this week have revealed flights of Glaucous-wingeds heading north.
Best, Andy Birch