Minas Gerais Tyrannulet

The Minas Gerais tyrannulet is about 12 cm (4.7 in) long and weighs about 8 g (0.28 oz). The sexes have the same plumage. Adults have a rufous to ochraceous wash on the forecrown, lores, and often the forehead. They have an indistinct yellowish supercilium and a whitish eye-ring. Their face is otherwise yellowish with a faint brownish crescent around the ear coverts. Their crown and upperparts are bright olive. Their wings are dusky with white to bright olive-yellow edges on the flight feathers. Their wing coverts are dusky with pale yellow to whitish tips that form two wing bars. Their tail is dusky with white to bright olive-yellow edges on the feathers. Their underparts are bright lemon yellow with a "vest" of diffuse olive streaks on the breast and sides. Both sexes have a dark brown iris, a black bill with an ashy to pale pinkish base to the mandible, and brownish gray to slate legs and feet.

The Minas Gerais tyrannulet was long known only in eastern Brazil's Minas Gerais state, but since 2008 has been found in Bahia and since 2013 in Goiás. It inhabits a variety of landscapes including tropical dry forest, gallery forest, and tall trees in deciduous scrublands along watercourses.

The Minas Gerais tyrannulet feeds primarily on arthropods. It forages actively, mostly from the forest's mid-story to its canopy though it will descend to within about 2 m (6.6 ft) of the ground in dense cover. It typically perches horizontally on a branch, usually with its tail slightly cocked up, and makes short sallies to snatch or hover-glean prey from leaves and twigs. It also occasionally gleans while perched. It typically forages in pairs or small family groups and only rarely as part of a mixed-species feeding flock.