If I go by the brochure given out at the entrance to the Yaquina Head Outstanding Natural Area, I would identify this gull as either a Western or a Glaucous-winged. I can't justify either choice however, as the Glaucous-winged Gull has a darker brown eye and the Western Gull has a peak above the eye on its head. This gull has a yellow eye and no peak. It also has a orange-yellow orbital ring around it eye just like Sibley points out. Therefore, I'm fairly confident this is a Herring Gull.