The Glaucous-winged Gull, Larus glaucescens, is a large, white-headed gull residing from the western coast of Alaska to the coast of Washington. It also breeds on the northwest coast of Alaska. During non-breeding seasons they can be found along the coast of California. It is a close relative of the Western Gull and frequently hybridizes with it, resulting in identification problems—particularly in the Puget Sound area. Glaucous-winged Gulls are thought to live about 15 years. One individual, notable because he had only one leg, lived at least 30.[citation needed]