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Western grebe : ウィキペディア英語版
Western grebe

The western grebe (''Aechmophorus occidentalis''〔Etymology: ''Aechmophorus'', "spear-bearer", from Ancient Greek ''aichme'' (a spear) + ''phoros'' (one who bears something around), in reference to its bill; ''occidentalis'': Latin for "western".〕) is a species in the grebe family of water birds. Folk names include "dabchick", "swan grebe" and "swan-necked grebe".
Western grebe fossils from the Late Pleistocene of SW North America were described as a distinct species,〔 but later ranked as a paleosubspecies ''Aechmophorus occidentalis lucasi''.〔 More recent study found them to fall within the variation now known to exist in today's birds.〔〔
==Description==

The western grebe is the largest North American grebe. It is long, weighs and measures across the wings.〔(Western Grebe ). All About Birds〕〔''CRC Handbook of Avian Body Masses'' by John B. Dunning Jr. (Editor). CRC Press (1992), ISBN 978-0-8493-4258-5.〕〔Burnie D and Wilson DE (Eds.), ''Animal: The Definitive Visual Guide to the World's Wildlife''. DK Adult (2005), ISBN 0789477645〕 It is black-and-white, with a long, slender, swan-like neck and red eyes. It is easily confused with Clark's grebe, which shares similar features, body size, behavior and habitat, and hybrids are known.
The western grebe has black around the eyes and a straight greenish-yellow bill whereas the Clark's grebe has white around the eyes and an up-turned bright yellow bill. The downy young of Western are grey; Clark's downy young are white.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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