South-eastern Brazil (coastal region from south-eastern Bahia south to Santa Catarina, inland locally in southern Minas Gerais, Sío Paulo and Paraná), eastern Paraguay (Canendiyu south to Caazapá) and extreme north-eastern Argentina (Misiones).
 
Population
Estimated population is unknown (2010).
Streak-capped Antwren (Terenura maculata) [XC286989]
by Jeremy Minns from Reserva Ecol\u00f3gica de Guapi A\u00e7u (REGUA), RJ, Brazil (call)
Streak-capped Antwren (Terenura maculata) [XC566801]
by Marcelo da Rocha from Paraibuna, S\u00e3o Paulo, Brazil (song)
Subspecies
Forms a superspecies with Orange-bellied Antwren (Terenura sicki). Further analysis of molecular, vocal and other characteristics that may differentiate them is needed.