The Arctic loon (Gavia arctica) is a loon in Alaska and the Arctic. It is also known as the Black-throat diver.
This bird is a medium loon with a straight, stout bill, white-spotted black back, and white flanks that are visible above water while swimming. Its head and nape are gray. The neck has black and white stripes on the sides, and a green or purple throat bar that may be difficult to see.
In the water, arctic loons sit and dive with ease. On land they are clumsy, barely able to walk, because their legs are so far back on their bodies.