Sometimes placed in genus Polyerata or Agyrtria, or, alternatively, in Hylocharis. Closely related to A. fimbriata. Hitherto treated as conspecific with A. lactea, but differs from nominate lactea in its somewhat brighter green crown in male (1); narrow white edges of blue throat patch in male (but not all specimens; ns); dark grey centres of white vent feathers making for a patterned vs plain vent (2); slightly larger size with (generally) distinctly longer bill (effect size 2.33; score 2); female whiter below than female lactea (which looks like male bartletti) (2). Differs from A. l. zimmeri in its longer bill (same length as lactea) (3.06; but zimmeri n=4 only) (2); violet-blue throat patch extending to entire breast vs extending down only to upper breast (2); crown dull shining green vs matt bronzy (2); undertail-coverts grey with white fringes vs white with grey streak around shaft (1). Monotypic.
E & SE Peru (S from San Martín), N Bolivia (Pando, La Paz, Beni and Santa Cruz) and adjacent W Brazil (Acre and SW Amazonas); doubtfully extreme E Ecuador (Napo).
Food and feeding
Status and conservation
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