Peruvian Warbling Antbird

The Peruvian warbling antbird or Peruvian antwarbler, (Hypocnemis peruviana) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Bolivia, Brazil, Colombia, Ecuador, and Peru. == Taxonomy and systematics == The Peruvian warbling antbird was long considered a subspecies of the then warbling antbird Hypocnemis cantator sensu lato. Following a study published in 2007 that assessed vocal differences and to a lesser degree differences in plumages among the warbling antbird's subspecies, it and several others were elevated to full species status. The Peruvian warbling antbird's further taxonomy is unsettled. The International Ornithological Committee and the Clements taxonomy assign it two subspecies, the nominate H. p. peruviana (Taczanowski, 1884) and H. p. saturata (Carriker, 1930). However, BirdLife International's Handbook of the Birds of the World does not recognize saturata but treats what it calls the "Peruvian antwarbler" as monotypic. This article follows the two-subspecies model. == Description == The Peruvian warbling antbird is 11 to 12 cm (4.3 to 4.7 in) long. Adult males of the nominate subspecies have a black crown with a white central streak and a white supercilium on an otherwise black and white speckled face. Their upperparts are grayish…