Abstract
Myrmoderus ruficauda is a passerine belonging to the family Thamnophilidae, and endemic to the Brazilian Atlantic Forest. This taxon is considered endangered by IUCN due to the historic devastation of its habitat. Currently, two subspecies are recognized, M. ruficauda ruficauda and M. ruficauda soror, whose populations are disjoint. The first taxon occurs in lowland forests in the eastern…