Streak-throated Canastero

The streak-throated canastero is 15 to 16 cm (5.9 to 6.3 in) long and weighs 23 to 24 g (0.81 to 0.85 oz). The sexes have the same plumage. Adults of the nominate subspecies have a dull whitish buff supercilium, dark brownish lores, and a vague brownish streak behind the eye on an otherwise dark brown and grayish buff streaked face. Their crown is dull dark brown with faint darker streaks and small blackish dots on the forehead. Their back, rump, and uppertail coverts are dull dark brown with faint darker streaks on the back that become longer and wider towards the rump. Voice: The streak-throated canastero's vocalizations are not well known. What is thought to be its song is "a quavering, soft trill 2–5 seconds in duration". It also makes a "doubled or tripled trill that lasts c. 1 second". Its contact call is "a burst of 'pit' notes, usually repeated 2–3 times".