R Marañón watershed in extreme southern Ecuador (southern Zamora-Chinchipe) and northern Peru (Cajamarca).
 
Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.
Population
Estimated population is unknown (2010) and decreasing.
Status NT
Habitat destruction and degradation through a prolonged period of cultivation, oil palm plantations, cattle-ranching, logging, and oil extraction are the main threats.
For more information see BirdLife International Species Factsheet.
Maranon Crescentchest (Melanopareia maranonica) [XC250439]
by Daniel F. Lane from Zamora-Chinchipe: SE Zumba: turnoff to Chito on La Chonta - El Chorro road, Ecuador (call, song, call\/song, pair)
Maranon Crescentchest (Melanopareia maranonica) [XC258636]
by Jonas Nilsson from Zamora-Chinchipe: SE Zumba: turnoff to Chito on La Chonta - El Chorro road, Ecuador (song)
Subspecies
Melanopareia elegans (Sibley and Monroe 1990, 1993) has been split into Elegant Crescentchest (Melanopareia elegans) and Maranon Crescentchest (Melanopareia maranonica) following SACC (2005).
Genus differs considerably from other members of family, though shows certain structural similarities with Teledromas. May form a superspecies with Elegant Crescentchest (Melanopareia elegans). Vocally very similar to Elegant Crescentchest (Melanopareia elegans), and sometimes considered conspecific, but is proportionally longer-tailed, with distinct plumage pattern, and geographically isolated.