This Gull looks verry strange for me, but it´s to dark on this picture. Do Netfugl readers have any idea about this bird. There is five pictures of this bird and the color of first one is near rigt color of the bird.

sorry the pictures are six

How big is this bird? In some of the other photoes the shape, including head/bill is very close to Glaucous Gull. However, the dark tail-pattern does not match that species, and generally the bird is also too dark dark, with less regular barring in under tail-coverts for Glaucous.
I suspect this bird to be a hybrid between Glaucous and Herring Gull - not too infrequent in Iceland.

The bird size is like a bigg Icelandic Herring Gull and smal Glaucous. Yes we have meny hybrit of this two species and they are verry different, but this was strange for me.

At least the age class should be changed to 2cy.