About Leptasthenura setaria (Temminck, 1824)
The Araucaria tit-spinetail, with the scientific name Leptasthenura setaria (Temminck, 1824), is 17 to 19 cm (6.7 to 7.5 in) long and weighs approximately 11 g (0.39 oz). It is a small-bodied, long-tailed furnariid that has a short crest and a longish (for its genus) slightly decurved bill. The sexes of this species have identical plumage. Adults have a thin white supercilium on a face that is otherwise striped black and white. 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 flight feathers that are otherwise blackish. Their tail is mostly reddish brown, with the inner webs of the three central pairs of feathers being 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, while their lower breast and belly are tawny-buff, with a richer tone on the flanks. Their iris is brown or gray, their bill is blackish with a paler base to the mandible, and their legs and feet are grayish green. Juveniles have an almost unstreaked crown and a less distinct overall pattern. The Araucaria tit-spinetail is distributed in Brazil, ranging from far southern Minas Gerais and Rio de Janeiro states south into Rio Grande do Sol and west into the Misiones Province of northern Argentina. It inhabits Araucaria angustifolia trees in nearly any landscape, including forest, woodland, scattered groves, gardens, and plantations. It mostly occurs at elevations between 750 and 1,400 m (2,500 and 4,600 ft), but can be found as high as 2,000 m (6,600 ft).
