White-browed Tit-Spinetail

The white-browed tit-spinetail is 16 to 18 cm (6.3 to 7.1 in) long and weighs about 13 g (0.46 oz). It is a small-bodied, long-tailed furnariid with a short bill. The sexes have the same plumage. Adults have a white supercilium with a narrow black border above it on an otherwise blackish and whitish streaked face. Their crown is bright rufous. Their upperparts are dull grayish brown, with narrow black-outlined white streaks that become more prominent on the lower back, then fainter on the rump, and become more obvious but still pale on the uppertail coverts. Voice: The white-browed tit-spinetail is very vocal and often sings while foraging. Its song is "a rapid, dry descending trill, sometimes with some 1-4 shorter introductory notes tjit tjit trrrrrrreeeeeeeeuuu and lasting two seconds". Its contact call is "a check or tjit note", and it also makes "a series of tleet notes".