|
A raven is one of several larger-bodied members of the genus ''Corvus''. These species do not form a single taxonomic group within the genus, but share similar characteristics and appearances that generally separate them from other crows. Ravens are known to have a life span of over 30 years, unlike crows with a life span of 8 years. The largest raven species are the common raven and the thick-billed raven. ==Etymology== The term "raven" originally referred to the common raven, the type species of the genus ''Corvus'', which has a larger distribution than any other species of ''Corvus'', ranging over much of the Northern Hemisphere. The modern English word ''raven'' has cognates in all other Germanic languages, including Old Norse (and subsequently modern Icelandic) ''hrafn''〔''Oxford English Dictionary'' entry for "raven."〕 and Old High German ''(h)raban'', all of which descend from Proto-Germanic '' *khrabanas''.〔(【引用サイトリンク】 work=Online Etymology Dictionary )〕 Obsolete collective nouns for a group of ravens (or at least the common raven) include "unkindness"〔(【引用サイトリンク】 title=Baltimore Bird Club. Group Name for Birds: A Partial List )〕 and "conspiracy".〔(【引用サイトリンク】 title=University of California Golf Club. List of Collective Nouns )〕 In practice, most people use the more generic "flock". 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Raven」の詳細全文を読む スポンサード リンク
|