The rusty-fronted canastero (Asthenes ottonis) is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae.

Their crown, back, and rump are rich brown and their uppertail coverts chestnut-rufous.

Their chin and upper throat are light orange-rufous to chestnut-rufous, their lower throat pale grayish buff streaked with brownish gray, their breast slightly darker and streaked with pale buff, their belly buff-whitish, and their flanks and undertail coverts rufescent brown.

[4] The rusty-fronted canastero is found in the Andes of south-central Peru's Huancavelica, Ayacucho, Apurímac, and Cuzco departments.

It inhabits semi-humid to arid montane scrublands and the edge of Polylepis woodlands.

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' ".