White-browed Antbird

The white-browed antbird (Myrmoborus leucophrys) is a species of perching bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in every mainland South American country except Argentina, Chile, Paraguay, and Uruguay. == Taxonomy and systematics == The white-browed antbird was described in 1844 as Pithys leucophrys. It eventually was determined to have these four subspecies: M. l. erythrophrys (Sclater, PL, 1855) M. l. leucophrys (Tschudi, 1844) M. l. angustirostris (Cabanis, 1849) M. l. koenigorum O'Neill & Parker, TA, 1997 Other subspecies and the geographical redistribution of these four have been suggested but as of 2024 not accepted. Authors have suggested that some of the subspecies might better be treated as full species. == Description == The white-browed antbird is 12 to 13.5 cm (4.7 to 5.3 in) long and weighs 18 to 22 g (0.63 to 0.78 oz). Adult males of the nominate subspecies M. l. leucophrys have the eponymous white forehead and supercilium. They are otherwise mostly dark bluish gray that is darkest on their wings and tail and lightest on their crissum. Their face below the white, their chin, and their throat are black. Adult females have a cinnamon to yellow-buff forehead and supercilium.…