Related to the gulls, but very different in appearance, are the small, dark-colored, quaint auks, guillemots and puffins of northern coasts, that look like miniature penguins, for they stand erect on two big feet. They are fishers, with great skill in swimming and diving, and breed in companies of thousands, sometimes, on the ledges of the sea-fronting  cliffs of Labrador, northern Scotland, Alaska, and Arctic islands. The extinct "great auk" of the North Atlantic coasts was a giant of this race.