Sometimes treated as conspecific with A. militaris, but, in spite of evidence of interbreeding, the characters of the two forms are constantly different over their respective ranges: present species is significantly larger, with weight 1265–1430 vs 972–1134 g (at least 2); paler lime-green on head and upperwing-coverts and paler blue on lower back to uppertail-coverts (1); orange-red vs dark red on tail (2); red vs black lines on face of old birds, notably females (1); deeper, more growling, less drawn-out call#R (1); more humid, lower-elevation forest habitat (sea-level to 1000 m vs 600–2600 m) (1). Race guayaquilensis sometimes considered too poorly differentiated to warrant recognition; mithocondrial DNA data do not show divergence with nominate race#R. Genus is masculine#R, so emended spelling ambigua is incorrect. Two subspecies currently recognized.
Food and feeding
Status and conservation
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