Both adults brown/purple forehead and lores, becoming browner on cheeks to ear coverts; burgundy/maroon crown and neck, washed with green/blue, the feathers edged with black; breast and abdomen dark lilac/purple, the feathers edged dusty black; olive/green lower underparts, feathers tipped green/blue; upperparts dark green, feathers edged black; secondary feathers 1-3 dark burgundy at bases, the remaining secondaries green; red carpal edge; tail red/brown. Bill grey/horn. Eye-ring grey/brown, eye orange/red.
As in adult but duller; face dull red/brown; occiput to hindneck green; area behind cheeks tinged with green. Eye brown.
Wide variety of calls including whistles, shrieks and squawks. Often loud, but also can be squeaky.
Lexicon of Parrots http://www.arndt-verlag.com/projekt/birds_3.cgi?Desc=E340.htm&Pic=340_1.JPG
BirdLife International http://www.birdlife.org/datazone/species/index.html?action=SpcHTMDetails.asp&sid=1690&m=0
ML Media Collection Catalogue 37824, Imperial Parrot Amazona imperialis, Robbins, Mark, Dominica, Apr. 9 1987, Cornell Lab of Ornithology
Parrots: A Guide to Parrots of the World, Juniper and Parr, 1998.
Parrots of the World, Forshaw and Cooper, 1989.
Parrots of the World, Forshaw, 2006.