Suiriri flycatcher

The suiriri flycatcher ("Suiriri suiriri") is a species of bird in the family Tyrannidae found in semi-open habitats in South America. It was formerly split into two species; the Chaco suiriri ("S. suiriri") and the Campo suiriri ("S. affinis"). "Suiriri" originates from Guaraní, where it is a generic name used for several medium-sized tyrant flycatchers.
Taxonomy.
The suiriri flycatcher was described by the French ornithologist Louis Vieillot in 1818 under the binomial name "Muscicapa suiriri". The type locality is Puerto Pinasco in Paraguay. It has traditionally been split into two species, the southern Chaco suiriri ("S. suiriri") with a white belly and the northern Campo suiriri ("S. affinis") with a yellow belly and a contrastingly pale rump, but they interbreed widely where they come into contact, and consequently most authorities now consider them to be part of a single species. It has been suggested that the taxon "bahiae" from north-eastern Brazil, which is considered a subspecies of "S. affinis" when that species is split from "S. suiriri", actually is the result of hybridization between "suiriri" and "affinis". For the most part it resembles the latter, but it lacks a contrastingly pale rump as the former.
The chapada flycatcher is a cryptic species that was included within the suiriri flycatcher until it was described in 2001. While both these species are relatively noisy, only the chapada flycatcher has the distinctive wing-lifting display.
Three subspecies are recognised:
Distribution and habitat.
The suiriri flycatcher occurs in a wide range of semi-open habitats such as Chaco, Caatinga and Cerrado, but generally avoids humid habitats such as the Amazon Rainforest. It ranges from northern Argentina, through Uruguay, Paraguay, eastern Bolivia, to a large part of eastern Brazil, with disjunct populations in southern Guyana, Amapá, and near the lower section of the Amazon River and central Madeira River. These disjunct populations are associated with remnant patches of relatively dry woodland and savanna that largely – or entirely – are surrounded by humid Amazonian forests.
It is fairly common locally, and consequently considered to be of least concern by BirdLife International.