Frequenting quiet lakes and usually sleeping on the water, this large bird rarely comes on land except to nest. It must run at least 18 meters across water to gain enough momentum to fly. Loons require such pristine conditions to nest that their presence as a nesting bird is a good indicator of the wilderness condition of a lake and the frequency of human activity on it. Winter adults have gray or brown upperparts; an irregular or broken pattern on the head to the base of the eye and the sides of the neck; white underparts, chin, and foreneck; a blue-gray bill; and a white eye ring. The Common Loon is the provincial bird of Ontario.