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Amsterdam albatross
The Amsterdam albatross or Amsterdam Island albatross,〔 ''Diomedea amsterdamensis'', is a huge albatross which breeds only on Amsterdam Island in the southern Indian Ocean. It was only described in 1983, and was thought by some researchers to be a sub-species of the wandering albatross, ''D. exulans''. BirdLife International and the IOC recognize it as a species, James Clements does not, and the SACC has a proposal on the table to split the species.〔〔Clements, J. (2007)〕〔Remsen Jr., J. V. (2009)〕 More recently, mitchondrial DNA comparisons between the Amsterdam albatross, the wandering albatross ''Diomedea exulans,'' the Antipodean albatross ''D. antipodensis'' and the Tristan albatross ''D. dabbenena,'' provide clear genetic evidence that the Amsterdam albatross is a separate species.〔http://onlinelibrary.wiley.com/doi/10.1111/j.1600-048X.2010.05295.x/abstract〕
==Taxonomy==
Albatrosses belong to the family Diomedeidae of the order Procellariiformes, along with shearwaters, fulmars, storm petrels, and diving petrels. They share certain identifying features. First, they have nasal passages attached to the upper bill called naricorns.〔Sibley D. A. (2001)〕 Although the nostrils on the albatross are on the sides of the bill. The bills of Procellariiformes are also unique in that they are split into between seven and nine horny plates. Finally, they produce a stomach oil made up of wax esters and triglycerides that is stored in the proventriculus. This is used against predators and serves as well as an energy-rich food source for chicks and for adults during their long flights.〔Double, M. C. (2003)〕
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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