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Id | 3767 | ||||||||||||
Family | Gulls, Terns and Skimmers ~ Måger, Terner og Saksnæb ~ Gaviotas, Charranes y Rayadores (Laridae) | ||||||||||||
Species |
Larus sp. (Larus sp.) |
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Subspecies | |||||||||||||
Locality |
Dragør Kommune, Denmark
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Date | 2021-11-27 | ||||||||||||
Sex, Age, Comment |
First calendar year. From the distance I was hoping this dark bird would be a young lesser black-backed gull, lbbg, and the only reason why I now have to say, it is not, is the obviously too bright primary window that simply can't be found on a pure lbbg, as far as I know. The fact that the bird is still mostly in juvenile plumage and the fact that the few second generation scapulars look very good for a lbbg, as well as the pattern of the tertials, could then indicate a bird of mixed genes. Could this be a hybrid Lesser Black-backed x Herring? The rather compact profile of the bird and the paling of the base of the bill could be caused by a Herring parent. I was also speculating whether it could a hybrid with Caspian involved, but would, no matter what, have expected a more progressed molt pattern than seen here. |
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Collection | Uncertain | ||||||||||||
Same bird | |||||||||||||
Sound | |||||||||||||
Map | |||||||||||||
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