Description wikipedia

The Alagoas antwren (Myrmotherula snowi) is a Critically Endangered species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is endemic to Brazil. == Taxonomy and systematics == The Alagoas antwren was originally described as a subspecies of the unicolored antwren (M. unicolor) but since the late twentieth century has been recognized as a full species. The two form a superspecies. The Alagoas antwren, the unicolored antwren (M. unicolor), the Yungas antwren (M. grisea), and the plain-winged antwren (M. behni) appear to form a monophyletic group with similar vocalizations and habitat requirements. The Alagoas antwren's specific epithet honors David Snow, a British ornithologist "who was a pioneer in life history studies of Neotropical birds". == Description == The Alagoas antwren is 9.5 to 10.5 cm (3.7 to 4.1 in) long and weighs about 8 to 11.5 g (0.28 to 0.41 oz). It is a small bird with a short tail. Adult males are almost entirely gray, with lighter underparts than upperparts. Their throat feathers have black bases and gray tips. Adult females are mostly rufous-brown with darker wing coverts and paler cheeks and throat. Their iris is brown, their bill brownish gray, and their legs and feet leaden gray.