Fantastic shot. The little tuft of disturbed snow, @ 6 o'clock, right at the base of the owl and the disturbed snow just behind and to the right of him is quite white. This convinces me the settled snow may be tinted, probably by settled dirt. I wonder if he has a mouse under all those feathers. Something made him sit there. I like it very much, he has that "who are you" and why are you here look on his face.