Kumliens Gull (Larus glaucoides kumlieni) or Nelson's Gull?

Simply put, Kumlien's Gulls are most similar to Iceland Gulls, with variable pigmentation in the primaries (and tail in immatures). The body can appear a little more bulky, head shape may be less rounded in a few birds, the bill can be slightly heavier (but still obviously short and small compared to e.g. American Herring Gull), and the wing projection may appear a little shorter at times (though the long primary projection is always quite obvious).

 

The Canadian race of Iceland Gull is known as "Kumlien's Gull" it is one of the most variable of all gulls in plumage characters, and no two seem to have the same amount of dark on the wingtips. It is also thought that these birds of the race 'Kumlieni' are basically a hybrid population between the Iceland Gull and the Thayers Gull. The taxonomy of various species of gulls is difficult and a lot more knowledge of these birds is required to see if they are actually seperate species. This I think is a third winter bird, or is it something like a Hybrid Glaucous x Herring gull. I think we should call this a 'Nelson's Gull'

Comments on Id certainly welcome.

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