Striolated Tit-Spinetail

The striolated tit-spinetail is 15 to 16 cm (5.9 to 6.3 in) long and weighs 10 to 11 g (0.35 to 0.39 oz). It is a small, long-tailed furnariid with a short bill. The sexes have the same plumage. Adults have a buff-whitish supercilium on an otherwise grayish face. Their crown is black with buff streaks and their upperparts brown with obvious buff streaks on the back. Their wings are dark brown with paler feather edges. Their tail is mostly brown with some rufous on the outermost feathers; the tail is graduated and appears forked due to the central feather's having reduced inner webs. Voice: The striolated tit-spinetail's song is a "level, short, hurried series of 2-5 very high, thin or full notes, last one often slightly lower". It has been rendered "psi, psi-psi, ks-ks-ksks-ks". Its calls are "an assortment of squeaky notes".