I found this Glaucous gull (Larus hyperboreus) hanging around near some ringbills this morning. My guides say that it is uncommon south of Canada, but they do not say if it is a rare bird... is it???

My Audubon guide says that in the world of gulls... this is the bad a**! It captures and eats auks, plovers, small ducks (it better leave my buffleheads alone), ptarmigans, and songbirds as well as lemmings, and fish.