Recent phylogenetic study based on plumage colour spectra indicated that this species formed a clade with A. nigricollis, with A. veraguensis and A. dominicus as sister-species#R. Very closely related to A. nigricollis, and occasionally regarded as conspecific, the two evidently replacing each other geographically, with at most very local sympatry in N Venezuela and perhaps elsewhere. Has often been considered conspecific with A. veraguensis. Taxon iridescens was treated as a race of present species in HBW, but is here assigned to A. nigricollis (which see). Proposed race nigrilineatus (Bay Is, Honduras) now held to be inseparable from gracilirostris; proposed race pinchoti (San Andrés I) generally regarded as inseparable from hendersoni. Four subspecies currently recognized.
Food and feeding
Status and conservation
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