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List of largest birds : ウィキペディア英語版 | List of largest birds
The largest living bird, a member of the Struthioniformes, is the ostrich (''Struthio camelus''), from the plains of Africa and Arabia. A large male ostrich can reach a height of and weigh over .〔(Largest Birds in The World ) AllTopTens.com〕 A mass of has been cited for the ostrich but no wild ostriches of this massive weight have been verified.〔(Avian Medicine: Princilpes and Application ). avianmedicine.net〕 Eggs laid by the ostrich can weigh and are the largest eggs in the world today. == Largest birds ever == The largest bird in the fossil record may be the extinct elephant birds (''Aepyornis'') of Madagascar, which were related to the ostrich. They exceeded in height and .〔Wood, Gerald ''The Guinness Book of Animal Facts and Feats'' (1983) ISBN 978-0-85112-235-9〕 The last of the elephant birds became extinct about 300 years ago. Of almost exactly the same upper proportions as the largest elephant birds was ''Dromornis stirtoni'' of Australia, part of a 26,000-year-old group called mihirungs of the family Dromornithidae.〔Murray, Peter F.; Vickers-Rich, Patricia (2004). ''Magnificent Mihirungs: The Colossal Flightless Birds of the Australian Dreamtime''. Indiana University Press. ISBN 978-0-253-34282-9〕 The largest carnivorous bird was ''Brontornis'', an extinct flightless bird from South America which reached a weight of and a height of about .〔Alvarenga, H.; Chiappe, L.; Bertelle, S. (2011-05-03), ''Phorusrhacids: the Terror Birds'', in Dyke, G.; Kaiser, G., Living Dinosaurs: The Evolutionary History of Modern Birds, Wiley, pp. 187–208, ISBN 978-0-470-65666-2〕 The tallest bird ever however was the giant moa (''Dinornis maximus''), part of the moa family of New Zealand that went extinct around 1500 CE. This particular species of moa stood up to tall,〔 but weighed about half as much as a large elephant bird or mihirung due to its comparatively slender frame.〔 The second largest bird ever capable of flight was ''Argentavis magnificens'', the largest member of the now extinct family Teratornithidae, found in Miocene-aged fossil beds of Argentina, with a wingspan up to , a length of up to , a height on the ground of up to and a body weight of at least .〔 Rivaling ''Argentavis'' in wingspan if not in bulk and mass, another contender for the largest known flying bird ever is ''Pelagornis sandersi'', which had a wingspan of up to 24 feet.
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