Rusty-fronted Canastero
Asthenes ottonis
The rusty-fronted canastero is 18 to 19 cm (7.1 to 7.5 in) long and weighs about 13 g (0.46 oz). The sexes have the same plumage. Adults have a grayish buff supercilium and arc below the eye, a small dark line in front of the eye, and a dark brownish patch behind the eye on an otherwise dull brownish face with pale streaks. Their forehead ("front") is rufous with faint pale streaks. Their crown, back, and rump are rich brown and their uppertail coverts chestnut-rufous. Their wings are mostly rufous-chestnut with dark fuscous tips on the flight feathers. Voice: The rusty-fronted canastero's song is "3 high-pitched ascending notes followed by a rapidly descending series, 'bsee-bzéé-bzee-di-di-di-di-d-d-d' ". Its call has been described as "high-pitched 'veer' and nasal 'djeeh' ".
ID text from Wikipedia, CC BY-SA 4.0
Streak-backed Canastero
Asthenes wyatti
The streak-backed canastero is 16 to 18 cm (6.3 to 7.1 in) long and weighs 17 to 25 g (0.60 to 0.88 oz). The sexes have the same plumage. Adults of the nominate subspecies A. w. wyatti have a narrow buff supercilium on an otherwise grizzled light brown and blackish face. Their crown, nape, back, rump, and uppertail coverts are olive-brown. Their forehead has dark brown flecks that become thin streaks on the crown and nape and wider streaks on the back. Voice: Despite its very large north to south range, the streak-backed canastero's song and calls appear to differ little among the subspecies. Its song is a "dry rattling phrase that gradually ascends in frequency while accelerating and increasing in amplitude until the very end when it suddenly fades and drops in frequency ti-ti-tititittrrreeuw".
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Rusty-fronted Canastero and Streak-backed Canastero.