Synallaxe vannier Asthenes pyrrholeuca

Fairly common but easily overlooked in the Andes and southern lowlands, mainly in drier habitats with low scrubby bushes. Usually rather skulking; keeps low in bushes and creeps in vegetation, but often sings from atop a bush. Plumage rather plain brownish overall, suggesting a House Wren, but note very long, loosely held tail with rusty sides. Compare with Cordilleran Canastero of more open habitats and also note distinctive voices.