no locality = Huánuco, Peru.
Recent molecular study indicates that present species and A. sulcatus are sister-species, with A. haematopygus sister to both#R. Until recently, considered conspecific with A. whitelianus (which see). Form described from C Peru as nigrirostris now lumped within derbianus. Monotypic.
Extreme S Colombia S along E slope of Andes to C Bolivia (Cochabamba).
Food and feeding
Status and conservation
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