Not … but scary!
For whatever reason, it seems that some 2nd winter European Herring gulls can be INCREDIBLY dark- with virtually all dark tails and well-barred rumps. The mimic American Herring Gulls. I don’t know for sure but suspect they are part of the argentatus variation. Chris Gibbins photographed this superb looking bird yesterday at Fraserburgh , Grampian.
P.S. Please check out Chris’s superb blog, especially his recent Caspian Gulls from Lithuania: http://chrisgibbins-gullsbirds.blogspot.com/
All photos Chris Gibbins, Fraserburgh, Grampian, 19th December 2010