The tooth-billed wren (''Odontorchilus cinereus'') is a species of

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 lightweigh ...

in the family Troglodytidae. It is found in

Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...

and

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

.Schulenberg, T. S. (2020). Tooth-billed Wren (''Odontorchilus cinereus''), version 1.0. In Birds of the World (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.tobwre1.01 retrieved June 1, 2021

Taxonomy and systematics

The tooth-billed wren shares its genus with one other species, the

grey-mantled wren The grey-mantled wren (''Odontorchilus branickii'') is a species of bird in the family Troglodytidae. It is found in Bolivia, Colombia, Ecuador, and Peru. Taxonomy and systematics The grey-mantled wren shares its genus with one other species ...

(''Odontorchilus branickii''). Some authors have suggested that they are conspecific or that they form a superspecies. The tooth-billed wren is

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...

Description

The tooth-billed wren is long; one male weighed . Adults have a grayish cinnamon crown, a grayish brown face, and a medium gray back. their throat and breast are buffy gray, the belly pale buff, and the flanks grayish white. The juvenile looks essentially the same.

Distribution and habitat

The tooth-billed wren is found mostly in Brazil but its range extends slightly into Bolivia's Santa Cruz Department. It is found south of the

Amazon River The Amazon River (, ; es, Río Amazonas, pt, Rio Amazonas) in South America is the largest river by discharge volume of water in the world, and the disputed longest river system in the world in comparison to the Nile. The headwaters of t ...

between the

Madeira River The Madeira River ( pt, Rio Madeira, link=no ) is a major waterway in South America. It is estimated to be in length, while the Madeira-Mamoré is estimated near or in length depending on the measuring party and their methods. The Madeira is ...

on the west and the

Xingú River The Xingu River ( ; pt, Rio Xingu, ; Mẽbêngôkre: ''Byti'', ) is a river in north Brazil. It is a southeast tributary of the Amazon River and one of the largest clearwater rivers in the Amazon basin, accounting for about 5% of its water. ...

on the east. It inhabits tall humid lowland forest at elevations up to .

Behavior

Feeding

The tooth-billed wren's diet is not known in detail, but the species is insectivorous. It forages in the canopy, above ground, exploring and probing the foliage along branches and in vine tangles. It usually is part of a

mixed-species foraging flock A mixed-species feeding flock, also termed a mixed-species foraging flock, mixed hunting party or informally bird wave, is a flock of usually insectivorous birds of different species that join each other and move together while foraging. These ar ...

Breeding

The tooth-billed wren's breeding season appears to span from June to September based on dates when active nests, dependent juveniles, and physiological evidence have been observed. It nests in a cavity in a limb or trunk high above the ground. The clutch size is believed to be two.

Vocalization

The tooth-billed wren's typical song is "a short, simple trill

both sexes sing it.

Status

The

IUCN The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu ...

has assessed the tooth-billed wren to be of Least Concern. The species' population has not been quantified and is "suspected to decline by a rate approaching 30% over three generations.'

References

{{Taxonbar, from=Q2224621 tooth-billed wren Birds of the Amazon Basin tooth-billed wren Taxonomy articles created by Polbot