Mottle-cheeked Tyrannulet Phylloscartes ventralis

Small olive-yellow flycatcher with a long slender tail, which is often held cocked. Olive above and yellow below with a pale eyebrow, a white chin, and two pale wingbars. Found in montane forests including Araucaria forests, where it forages actively in the middle and upper layers of the forest often with mixed-species flocks. The song is short and high-pitched.