Greater Wagtail-Tyrant

The greater wagtail-tyrant (Stigmatura budytoides) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Argentina, Bolivia, Brazil, and Paraguay. == Taxonomy and systematics == The greater wagtail-tyrant was originally described as Culicivora budytoides. Later in the nineteenth century it moved to genus Stigmatura and over time gained six subspecies. Two of them have been separated as what are now the lesser wagtail-tyrant (S. napensis) and Bahia wagtail-tyrant (S. bahiae). The remaining four subspecies are: S. b. budytoides (D'Orbigny & Lafresnaye, 1837) S. b. inzonata Wetmore & Peters, JL, 1923 S. b. flavocinerea (Burmeister, 1861) S. b. gracilis Zimmer, JT, 1955 Subspecies S. b. gracilis differs from the other three in several characteristics and has a separate range, so some authors consider it a separate species. == Description == The greater wagtail-tyrant is 14 to 16 cm (5.5 to 6.3 in) long and weighs 8.5 to 13.2 g (0.30 to 0.47 oz). The sexes have the same plumage; males are slightly larger than females. The nominate subspecies S. b. budytoides is the largest and S. b. gracilis is the smallest. Adults of the nominate subspecies have a bright yellow supercilium from the bill to…