W. E. D. Scott, 1900,
Recently split from U. dumetaria#R on suite of characters, some of which, however, show considerable overlap with other taxa (breast scaling, tail pattern). Split first suggested in 1951#R, and recently supported by molecular analysis#R. Species status achieved here on basis of very dark brown vs (at darkest) dark brown upperparts (1); shorter bill (effect size based on published data −2.46; score 2); distinctive song, a syncopated series of couplets or triplets vs continuous series of single notes (clearly at least 3); also different migration pattern and habitat (forest border vs open grassland and scrub) (1). Monotypic.
C Chile (S from Concepción to Valdivia) and SW Argentina (W Neuquén S to W Chubut).
Food and feeding
Status and conservation
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