A small bird with a long blue tail that is held cocked. Breeding males are usually brilliant sapphire blue with bright white wing patches. Females and nonbreeding males are very plain pale gray, and the patch between the eye and bill (lores) is also pale (compared to Purple-backed Fairywren which has very dark reddish lores). This species is typically found in very open and arid country with sparse bushes, where it often perches on the very top of bushes. Its call is a very fast trill.