The Bicolored Wren is one of the largest members of the wren family. As is typical of the tropical members of the group, the Bicolored Wren exhibits strong geographic variation. The six subspecies vary in the saturation of black on the head, eye-line, back and wing coverts. The western subspecies in northern Colombia and northwestern Venezuela are the most striking, with the greatest amount of black in the plumage, and the more easterly subspecies becoming progressively more rufous. Typical of the genus, the Bicolored Wren is a cooperative breeder and builds a domed nest with a narrow side-entrance; this species also will regularly adopt and convert other domed nests built by species of other genera, such as Pitangus or Myiozetetes.