A 15–17 cm canastero, small and highly terrestrial, active among rocks and low shrubs. Plumage is brownish-gray with cinnamon tones, giving a dull and uniform appearance. Fine, pale eyebrow; whitish throat with an orange gular patch (sometimes faint or absent), bordered by dark streaks. Chest with light streaking; cinnamon flanks. Long, pointed tail with a dark center and rufous outer edges; often held slightly raised. Bill thin, straight, black. Legs dark gray. Juvenile: duller, without the gular patch. Compared with similar species, the Rusty Canastero (Asthenes dorbignyi) is more reddish, with a strongly rufous rump, darker tail and a more marked reddish throat patch; while the Chestnut Canastero (Asthenes steinbachi) is more contrasting and has a gray crown.
Geographical distribution: Broad Andean–Patagonian distribution, from southern Peru and Bolivia along the entire Argentine Andes and Patagonia, reaching even the Tandilia and Ventania hill systems in Buenos Aires Province. In Argentina it occurs in: Jujuy, Salta, Tucumán, Catamarca, La Rioja, San Juan, Mendoza, Córdoba, San Luis, Neuquén, Río Negro, Chubut, Santa Cruz and the Ventania ranges; from 0 to 4,500 m depending on the region. Mostly resident, with winter altitudinal or latitudinal descents in southern populations.
Habitat: Always associated with rocky soils, open slopes, ravines and rocky outcrops. NOA (subsp. modesta and serrana): Andean rocky areas, Puna grasslands, montane scrub. Central Sierras (subsp. modesta): mountain grasslands, rocky outcrops, open tabaquillo woods. Patagonia (subsp. australis): shrub-steppe, canyons and rocky slopes.
Behavior: Very terrestrial, moving quickly among stones and shrubs. Confiding and curious, often allowing good views. Alone or in pairs; short, low and direct flights. Frequently sings exposed from rocks. Its voice is a rapid, ascending trill ending abruptly. Short “pit” calls.
Diet: Small arthropods such as beetles, ants, larvae, cockroaches and spiders, searched for among stones, crevices and the bases of shrubs.
Breeding: Spherical or cylindrical nest made of sticks, with a lateral entrance; interior lined with hair, wool and feathers. Placed in rock crevices, roots of shrubs or old nests of other furnariids. Clutch: 2–4 white eggs.
Conservation status: Species not considered threatened. Common over much of its range.
Authors of this compilation: Diego Carus and Maria Belén Dri – 06/12/2025