Bolivia (B), Brazil (B), Colombia (B), Ecuador (B), French Guiana (B), Guyana (B), Peru (B), Suriname (B), Venezuela (B).
Central and eastern Colombia (base of Andes southern from Meta, and extreme eastern in Guianía, Vaupés and Amazonas), eastern Ecuador, eastern Peru, southern Venezuela (Bolívar, Amazonas), the Guianas, Amazonian Brazil (east to R Tocantins, south to northern and western Mato Grosso) and north-western and north-eastern Bolivia.
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 (2013) and stable.
Pygmy Antwren (Myrmotherula brachyura) [XC459854]
by Fernando Igor de Godoy from Reserva Natural Palmar\u00ed, Rio Javar\u00ed, AM, Brazil (song)
Pygmy Antwren (Myrmotherula brachyura) [XC525605]
by Mauricio \u00c1lvarez-Rebolledo (Colecci\u00f3n de Sonidos Ambientales - Instituto Humboldt) from PNN Chiribiquete, cunar\u00e9- Am\u00fa, Colombia (?)
Subspecies
Myrmotherula brachyura (Sibley and Monroe 1990, 1993) was split into Pygmy Antwren (Myrmotherula brachyura) and Moustached Antwren (Myrmotherula ignota) following Stotz et al. (1996). This treatment has been further revised by SACC (2005) who include Short-billed Antwren (Myrmotherula obscura) (Sibley and Monroe 1990, 1993), within Moustached Antwren (Myrmotherula ignota).
Genetic and morphological analyses indicate that this species and Moustached Antwren (Myrmotherula ignota), Guianan Streaked Antwren (Myrmotherula surinamensis), Amazonian Streaked Antwren (Myrmotherula multostriata), Pacific Antwren (Myrmotherula pacifica), Cherrie's Antwren (Myrmotherula cherriei), Klages's Antwren (Myrmotherula klagesi), Stripe-chested Antwren (Myrmotherula longicauda), Sclater's Antwren (Myrmotherula sclateri) and Yellow-throated Antwren (Myrmotherula ambigua) represent a monophyletic group (the "streaked antwren assemblage"). Present species is closely related to first of those, which was treated as a subspecies of it by earlier authors, but recently shown to differ vocally and in plumage. Studies needed in order to determine whether any diagnosable differences exist among the various populations.
BirdLife International Species Factsheet