The double-collared crescentchest (''Melanopareia bitorquata'') 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 Melanopareiidae. It is found in eastern

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 adjacent areas in Brazil.

Taxonomy and systematics

The crescentchests (genus ''Melanopareia'') were previously included in family Rhinocryptidae, the tapaculos. A 2010 publication confirmed earlier work and created the present genus.Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 19 January 2021. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved January 19, 2021 The

International Ornithological Congress International is an adjective (also used as a noun) meaning "between nations". International may also refer to: Music Albums * ''International'' (Kevin Michael album), 2011 * ''International'' (New Order album), 2002 * ''International'' (The T ...

(IOC) recognizes the double-collared crescentchest as a species. However, the South American Classification Committee of the

American Ornithological Society The American Ornithological Society (AOS) is an ornithological organization based in the United States. The society was formed in October 2016 by the merger of the American Ornithologists' Union (AOU) and the Cooper Ornithological Society. Its m ...

(AOS) and the

Clements taxonomy ''The Clements Checklist of Birds of the World'' is a book by Jim Clements which presents a list of the bird species of the world. The most recent printed version is the sixth edition (2007), but has been updated yearly, the last version in 2022 ...

consider it to be a subspecies of collared crescentchest (''Melanopareia torquata bitorquata'').Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2019. The eBird/Clements Checklist of Birds of the World: v2019. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/ Retrieved August 15, 2019

Description

The double-collared crescentchest has a similar pattern to that of the collared crescentchest but the colors are deeper or different in several areas. Its upper parts are olive brown rather than brown and the underparts a deep ochre instead of buff. It has the same black-bordered white

supercilium The supercilium is a plumage feature found on the heads of some bird species. It is a stripe which runs from the base of the bird's beak above its eye, finishing somewhere towards the rear of the bird's head.Dunn and Alderfer (2006), p. 10 Also ...

but the "collar" at the back of the neck is a deeper rufous shade and has a black border.Drucker, J. (2020). Collared Crescentchest (''Melanopareia torquata''), 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.colcre1.01 retrieved May 2, 2021

Distribution and habitat

The double-collared crescentchest is found in Bolivia's Santa Cruz Department and the western edge of Brazil's

Mato Grosso Mato Grosso ( – lit. "Thick Bush") is one of the states of Brazil, the third largest by area, located in the Central-West region. The state has 1.66% of the Brazilian population and is responsible for 1.9% of the Brazilian GDP. Neighboring ...

State. It inhabits cerrado, a biome characterized by a mix of savannah and woodlands.

Behavior

The double-collared crescentchest's diet has not been described but the species is assumed to be

insectivorous A robber fly eating a hoverfly An insectivore is a carnivorous animal or plant that eats insects. An alternative term is entomophage, which can also refer to the human practice of eating insects. The first vertebrate insectivores were ...

. Examples of its song are her

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 not assessed the double-collared crescentchest.

References

{{DEFAULTSORT:crescentchest, double-collared double-collared crescentchest double-collared crescentchest