Plain-tailed Wren Pheugopedius euophrys

Bamboo-loving wren of the Andes known for its beautiful song duets. Plumage and song vary geographically. All birds are brown and gray overall with black and white face and mustache stripes. In most of Ecuador and in southwestern Colombia, it has black spots or speckles on its breast. Elsewhere it lacks breast markings and has a black crown. Pairs skulk in dense bamboo, and their loud, whistled song duets carry over long distances.