Parker's Spinetail

Parker's spinetail is 13 to 16 cm (5.1 to 6.3 in) long and weighs 16 to 20 g (0.56 to 0.71 oz). The sexes have the same plumage. Adults have a faint buff supercilium and lores on an otherwise dusky gray face. Their crown, back, rump, and uppertail coverts are rufous; the forecrown has narrow buff streaks. Their tail and wings are also rufous. Their throat is white, and the rest of their underparts are light brown or light brownish gray with indistinct whitish mottling. Voice: The song of Parker's spinetail is "an accelerating and descending series of nasal notes that ends in a chortle, e.g. tew-tew-tew-tew-trrrrrr" and is similarly described as "an accelerating, rising-falling chatter of nasal notes: teer teew-tew'tu'tutrrr". Its calls include "a sharp, fast chut-chut" given singly or tripled and "a longer, descending chatter, tchew-tew'tu'tu.