Oustalet's Tyrannulet Phylloscartes oustaleti

Small flycatcher with a long slender tail, which is usually held cocked. Mostly olive-green apart from yellow throat, belly, eyebrow, eyerings, and cheek patch. Note the prominent black patches behind the eye. Found in the canopy of the interior of humid forests mainly from 500–900 m elevation, where it is associated with mixed-species flocks. The song in a nasal, squeaky series of “ku-dut” notes.