Thank you all. I was surprised to find how much variation there is in this species. Some are dark grey, others almost white, with every shade in between. Apparently the grey ones predominate around Svalbard, although I shot some whitish ones that I will share. The eyes and eye hollows are dark on all of them.
Akos, moving the bird is a simple exercise. I carefully select the bird and feather the selection, putting that on a layer. I create a duplicate file in which I cut out the bird, and clone in some surrounding water to fill the void. Then I drag the "bird" layer from the first file into the second and position it to taste. I've used several variations on this, sometimes adding canvas when that seems easier.