Map showing locations of the three forest remnants of Atlantic Forest (PA, NF-1 and NF-2), where duet vocalizations of Myiothlypis leucoblephara were recorded, in southern Brazil. A: In black, location of the state of Santa Catarina; B: In black, identification of the municipality of Chapecó, in the state of Santa Catarina; C: location of the three study areas. Dark line limit of municipalities of Guatambu and Chapecó. Clear lines access routes. NF-1 and NF-2 = fragments in the National Forest of Chapecó; PA = private area.