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shy albatross
The shy albatross or shy mollymawk (''Thalassarche cauta'') is a medium-sized albatross that breeds off Australia and New Zealand's subantarctic islands and ranges extensively across the Southern Ocean.
Some authorities call this species the white-capped albatross.〔Remsen Jr., J. V. (2008)(a)〕
==Taxonomy==
This mollymawk was once considered to be the same species as the Salvin's albatross, ''Thalassarche salvini'' and the Chatham albatross, ''Thalassarche eremita'', but they were split around 2004. In 1998, Robertson and Nunn suggested a four-way split including the white-capped albatross, ''Thalassarche steadi''.〔Robertson, C. J. R. & Nunn, G. B. (1998)〕 The three-way split was accepted by Brooke in 2004,〔Brooke, M (2004)〕 the ACAP in 2006,〔ACAP (2006)〕 SACC in 2008,〔Remsen Jr., J. V. (2004)〕〔Remsen Jr., J. V. (2005)〕〔Remsen Jr., J. V. (2008)〕 and BirdLife International by 2000.〔BirdLife International (2008b)〕 James Clements seems to be the last major holdout on the three-way split.〔Clements, J. (2007)〕 The fourth split, ''steadi'', was only accepted by the ACAP in 2006,〔 and BirdLife International in 2008.〔 Finally, following Brooke, this species was shifted from ''Diomedea'' to ''Thalassarche'', which was generally agreed upon by most experts.
Mollymawks belong to the albatross family, Diomedeidae, which shares the order Procellariiformes with shearwaters, fulmars, storm petrels, and diving petrels. Procellariiformes have certain identifying features. They have nasal passages that attach to the upper bill, called naricorns (although the nostrils on the albatross are on the sides of the bill). The bills are also unique in that they are split into between seven and nine horny plates. They produce a stomach oil made up of wax esters and triglycerides that is stored in the proventriculus. This is used against predators as well as an energy-rich food source for chicks and for the adults during their long flights.〔Double, M. C. (2003)〕 They also have a salt gland that is situated above the nasal passage and helps desalinate their bodies, required due to the high amount of ocean water that they imbibe. It excretes a high saline solution from their nose.〔Ehrlich, Paul R. (1988)〕
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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