Both adults brown/olive crown and upperparts; wide dark blue frontal band, edged with pale blue above and below; face dull blue; breast dull olive; abdomen olive/yellow, sometimes suffused with orange in centre; bright yellow undertail coverts and undertail; bend of wing and outside lesser and secondary wing coverts soft purple/blue; pale blue middle secondary and lesser wing coverts; light underwing band. Bill dark grey. Eye dark brown.
As in adults but duller with front band or blue on face absent; pale underwing band present. Bill yellow/brown.
Call is said to be plaintive while bird is in flight, notes repeated frequently. While feeding emits occasional tittering notes.
Content Sources:
Lexicon of Parrots http://www.arndt-verlag.com/projekt/birds_3.cgi?Desc=E145.htm&Pic=145_1.JPG
Central Pets http://www.centralpets.com/animals/birds/parrots/prt6018.html
CITES http://www.cites.org/eng/resources/species.html
BirdLife International http://www.birdlife.org/datazone/species/index.html
Internet Bird Collection http://ibc.lynxeds.com/
Parrots: A Guide to Parrots of the World, Juniper and Parr, 1998.
Parrots of the World, Forshaw and Cooper, 1977.
Parrots of the World, Forshaw, 2006.