| Olive-crowned crescentchest | |
|---|---|
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Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Passeriformes |
| Family: | Melanopareiidae |
| Genus: | Melanopareia |
| Species: | M. maximiliani |
| Binomial name | |
| Melanopareia maximiliani (D'Orbigny, 1835) | |
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The olive-crowned crescentchest (Melanopareia maximiliani) is a species of bird in the family Melanopareiidae. It is found in Argentina, Bolivia, and Paraguay. [2]
The crescentchests (genus Melanopareia) were previously included in family Rhinocryptidae, the tapaculos. A 2010 publication confirmed earlier work and created their present genus. [3] [4] The olive-crowned crescentchest has three subspecies, the nominate Melanopareia maximiliani maximiliani, M. m. argentina, and M. m. pallida. The last has been suggested as a separate species due to vocal differences. [5] In addition, a subpopulation of M. m. pallida might be an undescribed taxon. [6]
The olive-crowned crescentchest is 15 cm (5.9 in) long. Males weigh 17.1 to 18.0 g (0.60 to 0.63 oz), one female weighed 16.7 g (0.59 oz), and unsexed specimens weighed 16.9 to 18.2 g (0.60 to 0.64 oz). The nominate subspecies' crown and upperparts are olive-brown, the throat deep buff, and the chest and belly ochraceous. It has a narrow buff supercilium with a black mask below and a black crescent and chesnut band between the throat and chest. M. m. argentina is similar but has paler underparts. M. m. pallida is paler still, its throat is more cinnamon than buff, and the facial mask is a lighter black. [7]
The nominate subspecies of olive-crowned crescentchest is found in La Paz Department of western Bolivia. M. m. argentina is found from central Bolivia to northwestern Argentina. M. m. pallida is found in southeastern Bolivia, western Paraguay, and northern Argentina. The species generally inhabits dry scrub and grassy areas with small bushes, but M. m. pallida also frequents sawgrass in the Chaco Basin. It ranges in elevation mostly from 1,700 to 2,950 m (5,580 to 9,680 ft) but is found as low as 1,200 m (3,900 ft) in Argentina. [7]
The olive-crowned crescentchest usually forages alone, but sometimes in pairs, by hopping through dense cover on or near the ground. Its diet has not been recorded. [7]
In Argentina the olive-crowned crescentchest breeds from September to December; an active nest was found in October in central Bolivia. Two nests of M. m. pallida were cups of vegetable fiber and palm leaves; they were hidden not far above the ground. One nest of M. m. argentina was a tunnel lined with grass. The species' clutch is two or three eggs. [7]
The nominate olive-crowned crescentchest and M. m. argentina have two songs, one described as "chuck" notes and the other as "chi" notes . The song of M. m. pallida is faster . The species' call is described as "chit chuck" . [7]
The IUCN has assessed the olive-crowned crescentchest as being of Least Concern. [1] It is locally fairly common and in Argentina occurs in several protected areas. [7]
The rusty-belted tapaculo, Liosceles thoracicus, is a species of bird in the family Rhinocryptidae. It is found in Brazil, Bolivia, Colombia, Ecuador, and Peru.
The elegant crescentchest is a species of bird in the family Melanopareiidae. It is found in Ecuador and Peru.
The crescentchests are a genus, Melanopareia, of birds from South America. The genus has long been placed with the tapaculos in the family Rhinocryptidae. Their placement there has been questioned and in 2007 the genus was placed in its own family, Melanopareiidae, by the South American Classification Committee. Subsequently, the family was accepted by the International Ornithological Congress Bird List and the Clements Checklist. The family Melanopareiidae was formally erected in 2009.
The Marañón crescentchest is a species of bird in the family Melanopareiidae. It is found in southern Ecuador and northern Peru.
The collared crescentchest is a species of bird in the family Melanopareiidae. It is found in Brazil and Paraguay.
The spotted bamboowren is a species of bird in the family Rhinocryptidae, the tapaculos. It is found in southeastern Brazil, far northeastern Argentina, and possibly Paraguay.
The crested gallito is a species of bird in the family Rhinocryptidae. It is found in Argentina, Bolivia, and Paraguay.
The chucao tapaculo is a species of bird in the family Rhinocryptidae. It is found in central Chile and adjacent Argentina; it has also been recorded in Chile's Magallanes Province.
The white-crowned tapaculo is a species of bird in the family Rhinocryptidae. It is found in Bolivia, Colombia, Ecuador, Peru, and Venezuela.
The Bolivian tapaculo is a species of bird in the family Rhinocryptidae. It is found in Bolivia and Peru.
The Paramo tapaculo is a species of bird in the family Rhinocryptidae. It is found in the Andes of Ecuador and southern Colombia.
The Caracas tapaculo is a species of bird in the family Rhinocryptidae. It is endemic to Venezuela.
The Chocó tapaculo is a species of bird in the family Rhinocryptidae. It is found in Colombia, Ecuador, and Panama.
The rufous-vented tapaculo is a species of bird in the family Rhinocryptidae. It is endemic to Peru.
The Mérida tapaculo is a species of bird in the family Rhinocryptidae. It is endemic to Venezuela.
The trilling tapaculo is a species of bird in the family Rhinocryptidae. It is found in Bolivia and Peru.
The puna tapaculo is a species of bird in the family Rhinocryptidae. It is found in Bolivia and Peru.
The white-browed tapaculo is a species of bird in the family Rhinocryptidae. It is found in northwestern Argentina.
Zimmer's tapaculo is a species of passerine bird in the family Rhinocryptidae. It is found in Bolivia and Argentina.
The double-collared crescentchest is a species of bird in the family Melanopareiidae. It is found in eastern Bolivia.
