Maquis Canastero

The maquis canastero (Asthenes heterura) is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Argentina and Bolivia. == Taxonomy and systematics == The maquis canastero is monotypic. At times it has variously been treated as a subspecies of the canyon canastero (A. pudibunda), as conspecific with the rusty-fronted canastero (A. ottonis), and as a superspecies with the two of them. However, it might be most closely related to the very similar sharp-billed canastero (A. pyrrholeuca). == Description == The maquis canastero is 16 to 17 cm (6.3 to 6.7 in) long and weighs 13 to 14 g (0.46 to 0.49 oz). The sexes have the same plumage. Adults have a buff supercilium and eyering on an otherwise light brownish face. Their crown, back, and rump are rich brown and their uppertail coverts chestnut. Their wings are mostly rufous with dark fuscous tips on the flight feathers. Their tail's inner two pairs of feathers are longer than the others and dusky rufous; the rest are chestnut-rufous and progressively shorter. Their chin and upper throat are pale orange-rufous, their breast and belly grayish buff with browner sides, and their flanks and undertail coverts…