| This bird is not quite within the normal range of appearances of Herring Gull, the following features hint at Glaucous Gull involvement:
- shape of the bird,
- the vinous colour-tone in general and the head in particular
- the "tabby" feather texture of the head
- the broken eye-ring
- the unmoulted scapulars
- possibly the feather-tip pattern of the tertials
However neither the pattern of the dorsum feathers not the primaries would yield this diagnosis.
(Thank you Richard Patient and Richard Millington for comments)
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Herring Gull 1CY 2 Dec
Herring Gulls
