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The jewel-babblers are a genus, ''Ptilorrhoa'' of birds in the Cinclosomatidae family. The genus contains four species that are endemic to New Guinea. The genus was once considered to contain the rail-babbler, but that species is now considered to belong to its own family. The genus is closely related to the better known quail-thrushes (''Cinclosoma'') of New Guinea and Australia. Together with a number of other genera they comprise the family Cinclosomatidae, although the validity of this family as a whole has been questioned. The jewel-babblers resemble the quail-thrushes in shape, being plump, long-tailed and short winged. They are adapted to life on the forest floor. The plumage of this genus is the most striking divergence from the quail-thrushes, having large amounts of blue and often with chestnut on the back. The throats of all species are white and the patch is mostly surrounded by a black edge. There is moderate levels of sexual dimorphism in the plumage, except in the dimorphic jewel-babbler where the female has no blue and is all chestnut coloured. When moving they hold the body horizontally to the ground, and bob their heads back and forth in a similar fashion to pigeons, and move their tail in a fashion similar to wagtails. The jewel-babblers as a whole are not a well known or studied genus. It contains the following species: * Spotted jewel-babbler (''Ptilorrhoa leucosticta'') * Blue jewel-babbler (''Ptilorrhoa caerulescens'') * * Brown-headed jewel-babbler (''Ptilorrha (caerulescens) geislerorum'') * Chestnut-backed jewel-babbler (''Ptilorrhoa castanonota'') ==References== * Del Hoyo, J.; Elliot, A. & Christie D. (editors). (2007). ''Handbook of the Birds of the World''. Volume 12: Picathartes to Tits and Chickadees. Lynx Edicions. ISBN 978-84-96553-42-2 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「Jewel-babbler」の詳細全文を読む スポンサード リンク
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