12 - 13 cm. 9.7 g. Bill slender and pointed, blackish, paler on lower mandible. Face gray with a white eye-ring. Pale reddish patch on crown usually concealed. Crown and upperparts gray-brown, tinged olive. Rump and feathers that cover uppertail bright olive-yellow. Throat and underparts gray, washed buffy brown on flanks. Feathers that cover undertail ochre-yellow. Legs grayish. Males and females are similar. Juveniles are duller and more brownish overall with 2 buff wing-bars, eyering tinged lemon, lacks of reddish crown patch.