Hitherto treated as conspecific with T. chiguanco, but differs in its darker grey-brown plumage (2); narrow but distinct yellow eyering vs none (3); lack of any streaking on chin and upper throat in male (1); shorter wing (sampled without measuring; allow 1); song of 4–7 vs 2–3 melodious notes followed by one or a few higher-pitched squeaky ones, thus with more whistled notes (2) which are shorter (ns) and given at higher pace (2)#R. Relationship to much larger T. fuscater worthy of study. Monotypic.
C Bolivia (S from C La Paz, Cochabamba and Santa Cruz) and NE Chile (Antofagasta, Atacama) S to WC Argentina (locally in adjacent C Chile).
Food and feeding
Status and conservation
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