Grey wren

The grey wren (Cantorchilus griseus) is a species of bird in the family Troglodytidae. It is endemic to the southwestern part of Amazonas state in Brazil. This small, poorly known wren somewhat resembles a house wren, but its upperparts are gray.

The grey wren is 11.5 cm (4.5 in) long. The adults have a lead-gray crown and upperparts; the tail is also gray with broad blackish bars. It has a faint whitish supercilium and the rest of the face is gray. The throat is whitish gray, the chest gray, and the belly a slightly buffy gray. It differs from others of its genus in its smaller overall size, its shorter tail, the gray plumage, and the absence of prominent facial markings.