A small, slender-billed, warbler-like brown songbird restricted to a cluster of small islands in Indonesia. Rufous-brown above with a gray head, and whitish underneath with rufous-washed flanks. Adult has a pale iris, immature a dark eye and a yellow-washed underside. Singles or pairs occupy a variety of lowland wooded environments, including mangroves, favoring vine tangles. No other warbler-like birds in its range. Vocalizations include a high-pitched warbled song, regularly rising and falling in pitch. Also gives a two-note “wi-wir” call.