A small, sharp-billed warbler-like bird with a yellow throat and vent, otherwise gray underparts, and broad white spectacles around the eyes. Found in heath vegetation on the edges of montane forest at the highest elevations of the South Pare Mountains, usually in hyperactive flocks. Separated from similar broad-ringed white-eyes by range. Also somewhat similar to African Yellow and Pale White-eyes, but found at higher elevations, and grayer below. Most common call is a high-pitched, descending rattle. Song is a subdued, chatty sequence of “chew” notes.