Could be confused with Drakensberg Prinia, but is less yellow below and more heavily streaked on the breast. May be distinguished from Namaqua Warbler by its buff-tipped (not plain) undertail and the more heavily streaked front.
Juvenile is yellower below.
Fynbos, Karoo scrub and bracken-covered slopes in mountainous terrain.
A sharp 'chleet-chleet-chleet' and a faster 'tit-tit-tit-tit'.