South-eastern Brazil in extreme eastern Sío Paulo and southern Rio de Janeiro.
 
Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.
Population
Estimated population is 1,000 - 2,499 (2010) and decreasing.
Status EN
Habitat destruction and degradation due to wide-spread clearance for pasture and plantations, tourism and development, is the main threat.
For more information see BirdLife International Species Factsheet.
Voice
Song is a three-second series of low-pitched 'tchóup' calls. Also high-pitched 'tcheek' calls and soft churrs.
Black-hooded Antwren (Formicivora erythronotos) [XC333205]
by GABRIEL LEITE from Mambucaba, Rio de Janeiro, Brazil (call)
Black-hooded Antwren (Formicivora erythronotos) [XC237149]
by Jeremy Minns from 6km north of Perequ\u00ea, RJ, Brazil (call, song)
Subspecies
Morphological, vocal and molecular studies indicate that, with exception of Narrow-billed Antwren (Formicivora iheringi), all species placed in current genus form a well-defined group. Following its original description, present species was transferred to genus Myrmotherula. After long period with no records, species was rediscovered, and information on vocalizations and ecology strongly indicated that it should be returned to its present genus, a conclusion supported by recent extensive morphological and vocal study.