The most common seabirds breeding in Oregon, Common murres are easily recognized by their distinct black and white breeding plumage and their upright stance at colonies. Wing-beats are rapid and like all alcids they can fly underwater. They are often seen over the ocean in long lines of 10-40 or more birds.
They nest on rocky islands and cliffs in colonies of tens or hundreds of thousands of birds packed together almost shoulder to shoulder. Major nesting concentrations in Oregon are on the south and north coasts reflecting the availability of suitable nesting habitat.