The Olympic Gull is a hybrid between Glaucous-winged and Western Gull, and according to this abstract has greater fitness than either parental form. first cycle Glaucous-winged x Western Gull: Fig 1) These two juveniles are siblings from the same nest. twitching. It is part of a complex of closely related gull species that interbreed readily. For one thing, the Glaucous-winged Gull’s back is a much lighter gray. I suppose F1 hybrids are well-known for their vigor in garden plant varieties. The Olympic Gull is a hybrid between Glaucous-winged and Western Gull, and according to this abstract has greater fitness than either parental form. Also, this gull has no black at all—the primaries (wingtips) are the same light gray as its back— and both its legs and its orbital ring are pink. Did you know? HOME. Western Gulls congregate in large numbers along the coast. Western Gull. Glaucous-winged Gull X Western Gull is a common hybrid, especially along the Washington state coast. As nouns the difference between seagull and gull is that seagull is any of several white, often dark backed birds of the family laridae having long pointed wings and short legs while gull is a seabird of the genus larus or of the family laridae or gull can be (slang) a cheating trick; a fraud. The Glaucous-winged Gull is a large, pale gull of Pacific shorelines. Adult Glaucous-winged Gull x Western Gull hybrid, Little Qualicum Estuary, Vancouver Island (BC, Canada), 13th January 2006 - photo by Guy Monty. Its bill is heavy for American Herring Gull x Glaucous-winged Gull hybrid, and the hint of a dark mask is suggestive of Western Gull heritage. Birds that look mostly like Glaucous-wingeds can have strongly checked upperparts typical of Western Gull, whereas birds that look mostly like Western Gulls can exhibit delayed PA1 molt and then attain relatively plain, medium gray scapulars typical of Glaucous-winged Gull. INTERBREEDING OF THE GLAUCOUS-WINGED GULL AND WESTERN GULL IN THE PACIFIC NORTHWEST J. Michael Scott The fifth edition of the A.O.U. The nesting ecology of breeding pairs of the Western Gull × Glaucous-winged Gull (Larus occidentalis × glaucescens) hybrid complex was investigated at two locations in coastal Washington.In Grays Harbor, breeding performance (clutch size, hatching and fledging success) was highest in vegetated habitat where nests were most dense and where natural screens blocked the nearest … It will also nest near colonies of California sea lions, scavenging any sea lion pups that die of natural causes. The Glaucous-winged Gull is the most abundant and widespread gull in Washington. Steve points out that next bird is much like a first-cycle Western Gull, but the folded primaries are not dark enough and tipped pale. Glaucous-winged Gull X Western Gull is a common hybrid, especially along the Washington state coast. Generally found around cold waters, but a few Glaucous Gulls (mostly young birds) may leave the Arctic and move far south in winter, sometimes reaching Florida, Texas, or northwestern Mexico. Gull is a synonym of seagull. Hybrids (known as Olympic Gulls) are not only fertile but in the centre of the zone they have superior fitness over pure birds. There is an extensive overlap between the ranges of Western Gull and Glaucous-winged Gull and in that overlap zone (between southern British Columbia and southern Oregon) the two species readily hybridise. listing. Following on from the Western Gull pictures in the last post, here is a shot of an Olympic Gull taken along 17-mile drive in California.

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