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White rhinoceros
The white rhinoceros or square-lipped rhinoceros (''Ceratotherium simum'') is the largest extant species of rhinoceros. It has a wide mouth used for grazing and is the most social of all rhino species. The white rhinoceros consists of two subspecies: the southern white rhinoceros, with an estimated 20,000 wild-living animals as of 2015, and the much rarer northern white rhinoceros. The northern subspecies has very few remaining, with only three confirmed individuals left (two females and one male), all in captivity.〔
==Naming==
A popular theory of the origins of the name "white rhinoceros" is a mistranslation from Dutch to English. The English word "white" is said to have been derived by mistranslation of the Dutch word "wijd", which means "wide" in English. The word "wide" refers to the width of the rhinoceros' mouth. So early English-speaking settlers in South Africa misinterpreted the "wijd" for "white" and the rhino with the wide mouth ended up being called the white rhino and the other one, with the narrow pointed mouth, was called the black rhinoceros. Ironically, Dutch (and Afrikaans) later used a calque of the English word, and now also call it a ''white'' rhino. This suggests the origin of the word was before codification by Dutch writers. A review of Dutch and Afrikaans literature about the rhinoceros has failed to produce any evidence that the word ''wijd'' was ever used to describe the rhino outside of oral use. Other popular theories suggest the name comes from its wide appearance throughout Africa, its color due to wallowing in calcareous soil or bird droppings or because of the lighter colour of its horn.
An alternative name for the white rhinoceros, more accurate but rarely used, is the square-lipped rhinoceros. The white rhinoceros' generic name, ''Ceratotherium'', given by the zoologist John Edward Gray in 1868, is derived from the Greek terms ''keras'' (κερας) "horn" and ''therion'' (θηριον) "beast". ''Simum'', is derived from the Greek term ''simus'' (σιμος), meaning "flat nosed".
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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