Southern Martin

The southern martin (Progne elegans) is a species of bird in the family Hirundinidae, the swallows and martins. One source states that it is known in every mainland South American country except Colombia, Guyana, and Venezuela, and there are undocumented sight records in those three countries. It has occurred as a vagrant in the Malvinas/Falkland Islands and the U.S. state of Florida == Taxonomy and systematics == The southern martin was originally described with its present binomial Progne elegans. For much of the twentieth century many authors treated the southern martin and Peruvian martin (P. murphyi) as conspecific with the Galapagos martin (P. modesta). The southern martin is monotypic. == Description == The southern martin is 17 to 20 cm (6.7 to 7.9 in) long. The sexes are dimorphic though both have a deeply forked tail. Adult males are almost entirely glossy steel-blue with blacker wings and tail. Females have duller steel-blue upperparts than males. Their underparts are mostly dusky brown with paler feather edges that give a scaly appearance; their undertail coverts are white with dusky streaks. Juveniles resemble adult females. == Distribution and habitat == Sources do not agree on the range of the southern martin. The South…