Double-collared crescentchest

The double-collared crescentchest (Melanopareia bitorquata) is a species of bird in the family Melanopareiidae. It is found in eastern Bolivia 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. The International Ornithological Congress (IOC) recognizes the double-collared crescentchest as a species. However, the South American Classification Committee of the American Ornithological Society (AOS) and the Clements taxonomy consider it to be a subspecies of collared crescentchest (Melanopareia torquata bitorquata).

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 but the "collar" at the back of the neck is a deeper rufous shade and has a black border.

Distribution and habitat
The double-collared crescentchest is found in Bolivia's Santa Cruz Department and the western edge of Brazil's Mato Grosso 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. Examples of its song are here.

Status
The IUCN has not assessed the double-collared crescentchest.