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Cape petrel
The Cape petrel (''Daption capense''), also called Cape pigeon or pintado petrel, is a common seabird of the Southern Ocean from the family Procellariidae. It is the only member of the genus ''Daption'', and is allied to the fulmarine petrels, and the giant petrels. It is also sometimes known as the Cape fulmar. They are extremely common seabirds with an estimated population of around 2 million.
==Taxonomy==
The Cape petrel is the only known member of the genus ''Daption'' and is in turn a member of the family Procellariidae and order Procellariiformes. There appears to be a subgroup within the family consisting of the giant petrels, the members of ''Fulmarus'', the Antarctic petrel, and the snow petrel.〔Tree of Life (27 Jun 2008)〕
All Procellariiformes share certain identifying features. First, they have nasal passages that attach to the upper bill called naricorns. The bills of Procellariiformes 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 can be sprayed out of their mouths as a defence against predators and as an energy rich food source for chicks and for the adults during their long flights.〔Double, M. C. (2003)〕 Finally, they also have a salt gland that is situated above the nasal passage and helps desalinate their bodies, 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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