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Black-capped donacobius : ウィキペディア英語版 | Black-capped donacobius
The black-capped donacobius (''Donacobius atricapilla'') is a conspicuous, vocal South American bird. It is found in tropical swamps and wetlands in Argentina, Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Peru, Suriname, and Venezuela; also Panama of Central America.〔 ==Taxonomy==
The black-capped donacobius is the only member of the genus ''Donacobius''. Its familial placement is not established, and ornithologists disagree as to its closest relations. In the 19th century, it was placed in the Turdidae, and in the 20th century, moved to the Mimidae. It had various English names, including the "black-capped mockingthrush". In the 1980s and 1990s, suggestions that it was a type of wren (Troglodytidae) were accepted by the South American Classification Committee (SACC), the American Ornithologists Union (AOU) and most other authorities. More recently, listing organizations and authors follow Van Remsen and Keith Barker's conclusion that it is not a wren either, but instead most closely related to an Old World (probably African) lineage. A current proposal to the SACC would create a monotypic family, Donacobiidae, for this species, but this is not universally accepted as some authorities insist it may prove to be a member of an existing Old World family,〔(【引用サイトリンク】year=2007 )〕 presumably the Locustellidae which seem to be its closest living relatives. These are long-tailed "warblers" from around the Indian Ocean region, many of which despite their cryptic coloration, smaller size and more solitary habits, are similar to the donacobius in stance, habitat and some aspects of their behavior (such as the nests); these "warblers" also have a similarly voice, but being higher-pitched they sound less grating and more like locusts (namely in ''Locustella'').
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