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North American porcupine : ウィキペディア英語版 | North American porcupine
The North American porcupine (''Erethizon dorsatum''), also known as the Canadian porcupine or common porcupine, is a large rodent in the New World porcupine family. The beaver is the only other larger rodent in North America. The porcupine is a caviomorph rodent whose ancestors rafted across the Atlantic from Africa to Brazil over 30 million years ago, and then migrated to North America during the Great American Interchange after the Isthmus of Panama rose 3 million years ago. They range from Canada, Alaska, and into northern Mexico. They are commonly found in coniferous and mixed forested areas, but have adapted to harsh environments such as shrublands, tundra, and deserts. They make their dens in hollow trees or in rocky areas. ==Origin== The word "porcupine" comes from the middle or old French word ''porcespin'', which means quill pig. Its roots derive from the Latin words ''porcus'' or pig and ''spina'' meaning thorns. Other colloquial names for the animal include quill pig. It is also referred to as the Canadian porcupine or common porcupine.〔(【引用サイトリンク】url=http://www.canadianforestry.com/html/forest/speaking3_e.html )〕 The porcupine's scientific name, ''Erethizon dorsatum'', can be loosely translated as "the animal with the irritating back". Several native American names exist, such as the Lakota name ''pahin'' meaning quill〔(【引用サイトリンク】url=http://www3.northern.edu/natsource/MAMMALS/Porcup1.htm )〕 and the Chipewyan name ''ts'l''.
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