A striking, largely bright turquoise-blue flycatcher with a white belly and prominent black mark between bill and eye. Juvenile is brown and extensively spotted, with blue wings and tail. Inhabits understory and upper levels of foothill and montane forest, where singles or pairs frequently join mixed-species flocks. Unmistakable within limited range in Indonesia and the Philippines. Song is a short, unchanging jumbled warble with no obvious introductory or ending notes, giving the impression that it starts and ends right in the middle of the song.