White-browed Spinetail

The white-browed spinetail is 11 to 13.5 cm (4.3 to 5.3 in) long and weighs 11 to 15 g (0.39 to 0.53 oz). It has a short tail compared to other spinetails. The sexes have the same plumage. Adults of the nominate subspecies H. g. gularis have whitish supercilia that almost meet on the forehead on an otherwise dark rufescent brown face. Their forehead, crown, and nape are rufescent brown with faint paler streaks. Their upperparts and wings are also rufescent brown. Their tail is rufescent brown; the ends of the feathers are pointed and lack barbs. Voice: The white-browed spinetail's song is "a series of high-pitched notes ending in trill, 'chit-chit-chit-chit-chi-chi-chichichichichichi' or 'cheet teet-teet-ti-tititit' ". Its calls include an "abrupt 'chip' " and a "nasal descending trill" and also "repeated single 'chiyt' or 'tseet' notes".