An attractive and very active warbler with bright yellow underparts, slate gray upperparts and head, rufous crown, bold white spectacles, and tail highlighted with white. Sexes similar. Common in mixed-species flocks in canopy and mid-level of high elevation Andean cloud forest. Feeds on insects while flashing wings and tail feathers. Song is a melodic series of warbling notes. Visually similar to Slate-throated Redstart but with obvious white spectacles and brighter rufous crown. Endemic to the Andes of Venezuela.