Substantially larger than most other kestrel species, the fox kestrel possesses well developed, long, pointed wings and an elongated tail. The chestnut plumage contrasts with conspicuous broad black streaks on the back and wings, and a rufous-coloured tail with faint black banding. The throat, flanks and undersides of the wings are unstreaked, with pale silvery-white bases, and the legs are long with short yellow toes. The eyes of the fox kestrel are pale brown and surrounded by a ring of yellow skin. In common with most kestrels, the two sexes are very similar, but juveniles can be distinguished by heavier streaking and broader black barring on the tail, blue-grey facial skin and yellow-green legs.