Size: L: 15 cm. Wt: 13 g. Males and females are similar.
Adult: upperparts olive; yellow eye-ring; two wing-bars, buffy or whitish; underparts variable, most commonly with pale greyish throat, pale olive upper breast, white lower breast, yellow belly and undertail coverts; bill with black upper mandible, yellow lower mandible; legs black
Juvenile: similar to adult, except upperparts brownish-olive, with feathers edged in buff, giving scalloped appearance; wing-bars dark buff; underparts with olive wash on breast
Nestling: altricial and downy; skin pinkish; down sparse, white