Spot-billed Ground Tyrant

The spot-billed ground tyrant (Muscisaxicola maculirostris) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Argentina, Bolivia, Chile, Colombia, Ecuador, and Peru and as a vagrant in Brazil. == Taxonomy and systematics == The spot-billed ground tyrant has three subspecies, the nominate M. m. maculirostris (D'Orbigny & Lafresnaye, 1837), M. m. niceforoi (Zimmer, JT, 1947), and M. m. rufescens (Berlepsch & Stolzmann, 1896). == Description == The spot-billed ground tyrant is 14 to 15.5 cm (5.5 to 6.1 in) long and weighs 11 to 17 g (0.39 to 0.60 oz). The sexes have the same plumage. Adults of the nominate subspecies have an olive-brown crown, a whitish to buffy white supercilium and spot above their lores, a dusky line through the eye, and an olive to gray patch on the ear coverts on an otherwise whitish to dusky face. Their nape and back are olive-brown. Their wing coverts are olive-brown with buff to rufous edges. Their remiges are dusky to brownish with thin pale rufous edges. Their tail is dusky brownish to black with thin whitish or pale yellowish outer webs on the feathers. Their chin and throat are whitish, their breast and…