White-bellied Spinetail

The white-bellied spinetail is 14.5 to 16 cm (5.7 to 6.3 in) long and weighs 16 to 22 g (0.56 to 0.78 oz). The sexes have the same plumage. Adults have gray lores on an otherwise grayish brown face. Their crown, back, rump, and uppertail coverts are also grayish brown. Their flight feathers are mostly dusky with pale rufous edges on the primaries. Their tail is dull rufous; the feathers are pointed. Their chin and upper throat are white or black with white fringes on the feathers. Their lower throat is black with white on the feather tips. Voice: The white-bellied spinetail's song is "a strange, low-pitched, and nasal churring, ch-r-r-r-r-r-r-r-r" that is also described as "a harsh, grating chatter: djr djr-djr'djr'djr'djr'djr'djr'djr'djr'djr-djr".