Gyrfalcon

[AgingEyes]

Peterson Field Guide to Birds lists this falcon as "scare"; Smithsonian Field Guide says it's "regular within a restricted region in North America". So I think I may as well share this couple of record shots with you, in case you haven't seen one before. They breed in the Artic.

It was perching in a power tower high and quite far away from where I took the shot. So you're seeing heavily cropped shots here.