Creamy-bellied Antwren

The creamy-bellied antwren (Herpsilochmus motacilloides) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is endemic to Peru. == Taxonomy and systematics == For much of the twentieth century the creamy-bellied antwren was treated as a subspecies of the Bahia antwren (Herpsilochmus pileatus), though at least one study suggested that it was a species. In the early twenty-first century, phylogenetic and other analyses confirmed that it is a species. The creamy-bellied antwren and the ash-throated antwren (H. parkeri) are sister species. The creamy-bellied antwren is monotypic. == Description == The creamy-bellied antwren is about 12 cm (4.7 in) long and weighs about 10.5 to 13 g (0.37 to 0.46 oz). Adult males have a black crown and nape, a white supercilium, a thin black streak through the eye, and white ear coverts. Their back and rump are gray or olive gray with white-tipped blackish scapulars and a small hidden white patch between them. Their wings are black with white tips on the coverts and white edges on the flight feathers. Their central tail feathers are black with small white tips; the rest are black with white tips that are progressively larger to the entirely…