Appears extreme long-legged in these photos as they were taken just seconds before it flew off. It was initially seen together with some normal colored same-aged Herring Gulls, and it within argentatus size variation.
The plumage looks like a pale Herring Gull, but features such as a pale frontal face extending on to the upper mandible, a small eye situated high in the head, a rather flat and long forehead and short primary projection behind tail could indicate a hybrid even though it lacks the bicolored bill as seen in many Glaucous Gull-hybrids. Thus from these photos alone an aberrant pale first winter Herring Gull is not safely ruled out.
