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Rüppell's vulture or Rüppell's griffon vulture (''Gyps rueppellii'') is a large vulture that occurs throughout the Sahel region of central Africa. The current population of 30,000 is decreasing due to loss of habitat, deliberate poisoning by ivory poachers and other factors.〔 Known also as Rüppell's griffon, Rueppell's griffon, Rüppell's griffin vulture, Rueppell's vulture and other variants, Rüppell's vulture is named in honor of Eduard Rüppell, a 19th-century German explorer, collector, and zoologist. Rüppell's vulture is considered to be the highest-flying bird, with confirmed evidence of a flight at an altitude of 11,300 m (37,000 ft) above sea level.〔 == Description == These are large vultures, noticeably outsizing the closely related white-backed vulture, with which they often co-occur in the wild. Adults are long,〔〔''Field Guide to the Birds of East Africa: Kenya, Tanzania, Uganda, Rwanda, Burundi'' by Stevenson & Fanshawe. Elsevier Science (2001), ISBN 978-0856610790〕 with a wingspan of , and a weight that ranges from .〔(【引用サイトリンク】title=Birdlife.org )〕〔''Raptors of the World'' by Ferguson-Lees, Christie, Franklin, Mead & Burton. Houghton Mifflin (2001), ISBN 0-618-12762-3〕 Both genders look alike: mottled brown or black overall with a whitish-brown underbelly and thin, dirty-white fluff covering the head and neck. The base of the neck has a white collar, the eye is yellow or amber, the crop patch deep brown. Silent as a rule, they become vocal at their nest and when at a carcass, squealing a great deal. File:Vautour de Rüppell MHNT.jpg|Egg File:VautourCrane2.jpg| Skull File:Gyps rueppellii -San Diego Zoo, California, USA-8a.jpg|At San Diego Zoo, California File:Gyps_rueppellii_(Avifauna,_NL).JPG|Head of an adult Rüppell's vulture File:Gyps rueppellii -Mara river crossing -Africa.jpg|At a blue wildebeest carcass in a river 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rüppell's vulture」の詳細全文を読む スポンサード リンク
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