A small dull-colored warbler with an indistinct pale eyebrow, a dull greenish upperside, a pale throat, and dull yellowish underparts. Usually shows an indistinct wingbar. Singles, pairs, and small groups inhabit lowland and hill forest, including secondary forest. Often joins mixed-species flocks. Sings a variable high-pitched warble mixed with twittering phrases. Easily identified as the only warbler in its limited range. Separated from other small yellowish birds such as flowerpeckers and sunbirds by the shape of the bill.