Collared crescentchest


The collared crescentchest is a species of suboscine passerine bird in the family Melanopareiidae. It is found in Bolivia, Brazil, and Paraguay.

Taxonomy

The collared crescentchest was formally described in 1831 by the German naturalist Prince Maximilian of Wied-Neuwied under the binomial name Synallaxis torquatus. The specific epithet is Latin meaning "collared". Wied-Neuwied specified the locality |locality] as the "Campo Geral" of inner Brasil. This is the grassland on the border between the Brasilian states of Bahia and Minas Gerais. The collared crescentchest is now one of four crescentchests placed in the genus Melanopareia that was introduced in 1853 by the German naturalist Ludwig Reichenbach.
Three subspecies are recognised:
The subspecies M. t. bitorquata has sometimes been treated as a separate species, the double-collared crescentchest.
The crescentchests were at one time included in family Rhinocryptidae, the tapaculos. A 2010 publication confirmed earlier work and formally created the present family Melanopareiidae.

Description

The collared crescentchest is long. Two unsexed specimens of M. t. rufescens weighed. The nominate subspecies' back and rump are brown and the underparts buff. The crown of the head is gray brown. It has a narrow white supercilium edged with black, a rufous "collar" on the back of the neck, and a black band across the breast. Subspecies M. t. rufescens is almost identical but its crown is reddish brown.
Both sexes of collared crescentchest sing year round, usually from atop a low shrub. The song is "a series of 3-6 loud, resonant 'chip' notes". Its call is "a penetrating churr".

Distribution and habitat

The collared crescentchest is found primarily in central Brazil but also occurs in far northeastern Paraguay. It inhabits cerrado, a biome characterized by a mix of savannah and woodlands. It prefers wetter open areas and avoids disturbed areas. In elevation it ranges up to.

Behavior

Feeding

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

Breeding

Little is known about the collared crescentchest's breeding phenology. Its nest is a globe of dry grass and leaves placed near the ground. Two eggs are laid and both sexes incubate them and care for nestlings.

Status

The IUCN has assessed the collared crescentchest as being of Least Concern. "Despite widespread degradation of cerrado habitat, the population of Collared Crescentchest is believed to be relatively stable throughout its large range."