Until recently considered conspecific with S. longirostris, but differs in strongly divergent voice (a loud series of “cueeo” notes vs a series of high, thin slurred whistles#R, rather abruptly modulated in the pattern up-down-up “iiiiui”#R) (3); smaller size, with shorter wing, effect size 5.84 (score 3); males with narrower outer rectrices distally (apparently a previously unreported character, but perhaps proportionate to smaller size) (ns); paler overall coloration including greyer, less obviously vermiculated (as well as less black-marked) crown (2); white bar in wing of male narrower, white distal tips of tail extending less far up tail (1). Genetic position is still not completely resolved, it being part of a four-way polytomy, within which this species apparently forms a clade apart#R. Monotypic.
W Peru and extreme N Chile (Arica and Tarapacá S to Quillagua)#R.
Food and feeding
Status and conservation
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