A slender ash-gray apalis with a striking diagnostic white panel on the folded wing and two pairs of white outer tail feathers which are usually obvious on the dark tail. Upperparts are darker than underparts. Presumably resident in areas of semi-arid shrubland, particularly those with scattered thorn trees along dry watercourses. Pairs sing a swaying musical duet, typically a repeated “dree-dooo-tee-too” for up to a minute, interspersed with other musical notes, buzzes, ticks, and trills.