Yellow-bellied Chat-Tyrant

The yellow-bellied chat-tyrant (Silvicultrix diadema) is a species of passerine bird in the family Tyrannidae, the tyrant flycatchers. It is found in Colombia, Ecuador, Peru, and Venezuela. == Taxonomy and systematics == The yellow-bellied chat-tyrant has a complicated taxonomic history. It was formally described in 1843 as Myiobius diadema. In 1966 Meyer de Schauensee placed the yellow-bellied chat-tyrant in genus Ochthoeca. Wesley Lanyon moved it to Silvicultrix when he erected that genus in 1986. In 2009 the IOC adopted the change in genus to Silvicultrix. BirdLife International's Handbook of the Birds of the World (HBW) adopted the reassignment to Silvicultrix in 2016, the Clements taxonomy in 2022, and the South American Classification Committee of the American Ornithological Society (SACC) in 2023. The yellow-bellied chat-tyrant has these five subspecies: S. d. jesupi (Allen, JA, 1900) S. d. rubellula (Wetmore, 1946) S. d. tovarensis (Gilliard, 1940) S. d. diadema (Hartlaub, 1843) S. d. gratiosa (Sclater, PL, 1862) == Description == The yellow-bellied chat-tyrant is 12 to 12.5 cm (4.7 to 4.9 in) long. It appears large-headed and has long rictal bristles. The sexes have the same plumage. Adults of the nominate subspecies S. d. diadema have a dark olive crown, blackish lores…