Masked Water Tyrant

The masked water tyrant (Fluvicola nengeta) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Argentina, Brazil, Colombia, Ecuador, Peru, and as a vagrant to Uruguay and Paraguay. == Taxonomy and systematics == The masked water tyrant was formally described in 1766 as Lanius nengeta, erroneously placing it in the shrike family Laniidae. It is now placed in the genus Fluvicola that was introduced by the English naturalist William Swainson in 1827. The genus name is derived from a combination of Latin fluvius meaning "river" and -cola meaning "dweller". Some early twentieth century authors called it Fluvicola climazura. The masked water tyrant has two subspecies, the nominate F. n. nengeta (Linnaeus, 1766) and F. n. atripennis (Sclater, PL, 1860). Subspecies F. n. atripennis was formally described as a species and some early twenty-first century authors suggest that it again should be treated that way. The masked water tyrant shares genus Fluvicola with the pied water tyrant (F. pica) and the black-backed water tyrant (F. albiventer). == Description == The masked water tyrant is 14.5 to 15 cm (5.7 to 5.9 in) long. The sexes have the same plumage. Adults are mostly white. They…