Black-fronted Tyrannulet Phylloscartes nigrifrons

Small flycatcher of humid tepui forests. Best field marks are grizzled black-and-white face, dark lores, and gray crown. Also note clean grayish-white underparts. Found in forests at middle and higher elevations (above 800 m) on tepui slopes, where it typically occurs in pairs and forages actively for insects, often joining mixed-species flocks. Generally gives only indistinct chip notes while foraging, but may also give an arresting, staccato rattle very unlike other birds in range. Most likely to be confused with the more common Chapman’s Bristle-Tyrant but has conspicuously dark lores and a gray crown and lacks yellow tones on breast and belly.