China; error = Thoungyah, Myanmar.
Sometimes considered to be closely related to P. germaini, but this is not supported by molecular data; there is some evidence, however, to suggest that present species forms a clade with P. germaini, P. katsumatae, P. inopinatum and P. chalcurum (and presumably) to the exclusion of the remaining members of the genus#R. Genetic data indicate that present species is most closely related to P. chalcurum and that these two species evolved most recently within the genus#R. The form katsumatae was recently proposed for species status, and is treated thus here; male katsumatae differ from males of other taxa in P. bicalcaratum in their smaller size (effect size on wing 8.57, score 3); brilliant red and more extensive vs dirty grey to pale yellow and less extensive facial skin (3); green vs purplish ocelli, with a somewhat different shape (2); lack of elongate crown feathers (1); darker crown (1); more densely and neatly vermiculated body plumage (ns); browner vs greyer overall coloration (ns). Internal taxonomy probably requires revision; races intergrade, with intermediate forms fairly common, and individual variation is not uncommon throughout the range; bakeri and ghigii perhaps better synonymized with nominate#R. Poorly known form bailyi sometimes recognized, but its geographical range is not known (W Assam or E Himalayas suggested) and location of specimens is uncertain#R. Three subspecies recognized.
Food and feeding
Status and conservation
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