| 翻訳と辞書 |
| Greater yellow-headed vulture ： ウィキペディア英語版 |
Greater yellow-headed vulture
The greater yellow-headed vulture (''Cathartes melambrotus''), also known as the forest vulture, is a species of bird in the New World vulture family Cathartidae. It was considered to be the same species as the lesser yellow-headed vulture until they were split in 1964. It is found in South America in tropical moist lowland forests. It is a fairly large bird, with a wingspan of , a weight of and a body length of . The body plumage is black, and the head and neck, which are featherless, range in color from deep yellow to pale orange. It lacks a syrinx, and its vocalizations are therefore limited to grunts or low hisses.
The greater yellow-headed vulture feeds on carrion and locates carcasses by sight and by smell, an ability which is rare in birds. It is dependent on larger vultures, such as the king vulture, to open the hides of larger animal carcasses, as its bill is not strong enough to do this. Like other New World vultures, the greater yellow-headed vulture utilizes thermals to stay aloft with minimal effort. It lays its eggs on flat surfaces, such as the floors of caves, or in the hollows of stumps. It feeds its young by regurgitation.
==Taxonomy==
The greater yellow-headed and the lesser yellow-headed vulture were distinguished as separate species and described in 1964 by Alexander Wetmore; both species had earlier been known as yellow-headed vultures. The greater yellow-headed vulture's genus is ''Cathartes'', which means "purifier", and is Latinized from the Greek ''kathartēs''/καθαρτης. The common name, vulture, is derived from the Latin word ''vulturus'', meaning "tearer," in reference to its feeding habits.
The exact taxonomic placement of the greater yellow-headed vulture and the remaining six species of New World vultures remains unclear.〔 Although they are similar in appearance and have similar ecological roles, the New World and Old World vultures evolved from different ancestors in different parts of the world. Just how different the two are is currently under debate, with some earlier authorities suggesting that the New World vultures are more closely related to storks.〔Sibley, Charles G. and Monroe, Burt L. (1990). ''(Distribution and Taxonomy of the Birds of the World )''. Yale University Press. ISBN 0-300-04969-2. Accessed 2007-04-11.〕 More recent authorities assert their overall position in the order Falconiformes along with the Old World vultures〔Sibley, Charles G., and Ahlquist, Jon E. (1991). ''(Phylogeny and Classification of Birds: A Study in Molecular Evolution )''. Yale University Press. ISBN 0-300-04085-7. Accessed 2007-04-11.〕 or place them in their own order, Cathartiformes.〔 (Electronic Supplementary Material ) (PDF)〕 The South American Classification Committee has removed the New World vultures from Ciconiiformes and instead placed them in ''Incertae sedis'', but notes that a move to Falconiformes or Cathartiformes is possible.〔Remsen, J. V., Jr.; C. D. Cadena; A. Jaramillo; M. Nores; J. F. Pacheco; M. B. Robbins; T. S. Schulenberg; F. G. Stiles; D. F. Stotz & K. J. Zimmer. 2007. ( ''A classification of the bird species of South America.'' ) South American Classification Committee. Retrieved on 2007-10-15〕
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「Greater yellow-headed vulture」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|