Rusty-winged Antwren

The rusty-winged antwren (Herpsilochmus frater) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Bolivia, Brazil, Colombia, Ecuador, Guyana, Panama, Peru, Suriname, and Venezuela. == Taxonomy and systematics == The rusty-winged antwren's taxonomy is unsettled. Before 2020 the American Ornithological Society, the International Ornithological Committee, and the Clements taxonomy treated it and what is now the rufous-margined antwren (Herpsilochmus rufimarginatus) as a single species, the rufous-winged antwren with the binomial H. rufimarginatus. These systems assigned it four subspecies: H. r. exiguus Nelson, 1912 H. r. frater Sclater, PL & Salvin, 1880 H. r. scapularis (zu Wied-Neuwied, 1831) H. r. rufimarginatus (Temminck, 1822) Beginning in 2020 these systems split the rufous-winged antwren into the two current species. They assigned subspecies exiguus and frater to the rusty-winged antwren and merged scapularis into rufimarginatus as the monotypic rufous-margined antwren. However, by 2018 BirdLife International's Handbook of the Birds of the World (HBW) had split the rufous-winged antwren into the "northern rufous-winged antwren" (as H. scapularis, and including exiguus and frater) and the "southern rufous-winged antwren" (the monotypic H. rufimarginatus). As of early 2024 HBW retains that treatment. This article follows the majority two-subspecies model.…