The jewel-babblers are the

bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweig ...

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

''Ptilorrhoa'' in the

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Cinclosomatidae Cinclosomatidae is a family of passerine birds native to Australia and New Guinea. It has a complicated taxonomic history and different authors vary in which birds they include in the family. It includes the quail-thrushes and jewel-babblers. Ta ...

. The genus contains four species that are

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...

New Guinea New Guinea (; Hiri Motu: ''Niu Gini''; id, Papua, or , historically ) is the world's second-largest island with an area of . Located in Oceania in the southwestern Pacific Ocean, the island is separated from Australia by the wide Torr ...

. 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

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 Plumage ( "feather") is a layer of feathers that covers a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage differ between species and subspecies and may vary with age classes. Within species, ...

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 Sexual dimorphism is the condition where the sexes of the same animal and/or plant species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. The condition occurs in most an ...

in the plumage, except in the

dimorphic jewel-babbler The brown-headed jewel-babbler (''Ptilorrhoa geislerorum''), also known as the dimorphic jewel-babbler or brown-capped jewel-babbler, is a jewel-babbler in the family Cinclosomatidae. It is now usually considered to be distinct from the blue jew ...

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

pigeon Columbidae () is a bird family consisting of doves and pigeons. It is the only family in the order Columbiformes. These are stout-bodied birds with short necks and short slender bills that in some species feature fleshy ceres. They primarily ...

s, and move their tail in a fashion similar to

wagtail Wagtails are a group of passerine birds that form the genus ''Motacilla'' in the family Motacillidae. The forest wagtail belongs to the monotypic genus ''Dendronanthus'' which is closely related to ''Motacilla'' and sometimes included therein. ...

s. The jewel-babblers as a whole are not a well known or studied genus. It contains the following

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

References

* Del Hoyo, J.; Elliot, A. & Christie D. (editors). (2007). ''

Handbook of the Birds of the World The ''Handbook of the Birds of the World'' (HBW) is a multi-volume series produced by the Spanish publishing house Lynx Edicions in partnership with BirdLife International. It is the first handbook to cover every known living species of bird. ...

''. Volume 12: Picathartes to Tits and Chickadees. Lynx Edicions. Cinclosomatidae Birds described in 1940 Taxonomy articles created by Polbot {{Cinclosomatidae-stub