Unicolored Antwren

About the Unicolored Antwren

The unicolored antwren (Myrmotherula unicolor) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is endemic to southeastern Brazil. The unicolored antwren and the Alagoas antwren (M. snowi) were previously considered conspecific and now form a superspecies. The unicolored antwren is monotypic. The unicolored antwren, the Yungas antwren (M. grisea), the Alagoas antwren (M. snowi), and the plain-winged antwren (M. behni) appear to form a monophyletic group with similar vocalizations and habitat requirements.

The unicolored antwren is 9 to 10 cm (3.5 to 3.9 in) long and weighs 6.5 to 8 g (0.23 to 0.28 oz). It is a smallish 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 have olive-brown upperparts with a grayish tinge on the crown and nape and yellowish brown uppertail coverts. Their wings are dark grayish brown with reddish yellow-brown edges on the flight feathers. Their tail is reddish yellow-brown. Their throat is whitish and their underparts mostly olive-buff... Wikipedia →