This white winged gull was seen on the Niagara River in Niagara Falls, NY around 2pm today. Only have seen a couple of Iceland Gulls in my time and not a Glaucous yet.
See the three pictures entitled "ww_gull1-3".
My first impression was Glaucous as it looked bulky from a distance.
Then I was able to glean some context by the two other nearby gulls shown in two of the pictures.
I created two scenarios in my head: one at the time, and one afterwards. In both scenarios I perceive the white wi