Araguaia Spinetail

The Araguaia spinetail is 15 to 16 cm (5.9 to 6.3 in) long. The sexes have the same plumage. Adults have dull whitish lores on an otherwise brownish gray face. Their crown is grayish brown, their mantle, back, and rump bright rufous, and their uppertail coverts dark rufous. Their wings are bright rufous with fuscous-brown tips on the flight feathers. Their tail is dark rufous; it is graduated and the feathers have blunt tips. Their throat is white; their underparts are mostly tan with a whitish center on a paler belly. Voice: The Araguaia spinetail's song is a "single nasal downslurred note keeeu, repeated at intervals of 1‒3 seconds". It also makes a "nasal single disyllabic note ki-eet". Both sexes sing. They sing mainly in the morning, and from a hidden perch in vegetation.