Description wikipedia

The Araucaria tit-spinetail (Leptasthenura setaria) is a Near Threatened species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Argentina and Brazil. The Araucaria tit-spinetail is 17 to 19 cm (6.7 to 7.5 in) long and weighs about 11 g (0.39 oz). It is a small-bodied, long-tailed furnariid with a short crest and a longish (for the genus) slightly decurved bill. The sexes have the same plumage. Adults have a thin white supercilium on an otherwise black and white striped face. Their crown and crest are blackish with narrow paler streaks. Their upperparts are reddish brown with faint pale streaks on the upper back. Their wings are mostly rufous with wide rufous bases on the otherwise blackish flight feathers. Their tail is mostly reddish brown with the inner webs of the three central pairs a darker brown; the tail is deeply forked and the feathers have bare shafts at their ends. Their throat and upper breast are whitish with blackish streaks; their lower breast and belly are tawny-buff that is richer on the flanks. Their iris is brown or gray, their bill blackish with a paler base to the mandible, and their legs and feet grayish green. Juveniles have an almost unstreaked crown and a less distinct pattern overall.