About the Southern Rough-winged Swallow
The southern rough-winged swallow (Stelgidopteryx ruficollis) a species of bird in the family Hirundinidae, the swallows and martins. It is found in Central America from Honduras south, in every mainland South American country except Chile, on Trinidad, and as a vagrant to Aruba, Bonaire, Curaçao, Tobago, and the Falkland Islands.
The southern rough-winged swallow was originally described in 1817 as Hirundo ruficollis by French ornithologist Louis Vieillot in his Nouveau Dictionnaire d'Histoire Naturelle. It was later reassigned to its present genus Stelgidopteryx which was erected in 1858. For much of the twentieth century it and what is now the northern rough-winged swallow (S. serripennis) were treated as conspecific. They are the only members of the genus and form a superspecies.
The southern rough-winged swallow has these four subspecies: The sexes have almost the same plumage. Adult males of the nominate... Wikipedia →