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Glaucous-winged Gull (Larus glaucescens)

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  • Wikipedia - 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, in the summertime. 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. This species also hybridizes regularly with the herring gull in Alaska. Both hybrid combinations resemble the Thayer's gull. Glaucous-winged gulls are thought to live about 15 years, but some live much longer; a bird in British Columbia, for example, lived for more than 21 years, while one in the US state of Washington, lived for at least 22 years, 9 months. The longevity record though, is more than 37 years, for a bird banded as a chick in British Columbia.