White-whiskered Spinetail

The white-whiskered spinetail is 15 to 17 cm (5.9 to 6.7 in) long and weighs 14 to 16 g (0.49 to 0.56 oz). The sexes have the same plumage. Adults of the nominate subspecies have a wide white "moustache" and a wide rufous supercilium on an otherwise blackish face. Their crown is dark gray mottled with black and their nape, back, rump and uppertail coverts bright rufous. Their wings are bright rufous with dusky tips on their flight feathers. Their tail's proximal two-thirds is bright rufous and the distal third dark fuscous. Their chin is white and their throat black. Voice: The white-whiskered spinetail's song has four notes of which the middle two are stronger, a repeated "nasal 'a-dít-dít-du' ". Its call is "a nasal 'paa-pip' " and it renders "a nasal 'naaaa' " when alarmed.