male-dark green in colour; emerald green forehead and cheeks; purple/blue lower back and rump; purple/blue primary and secondary coverts, secondary feathers, and underwing coverts; outer webs of inner primary feathers purple/blue at bases. Upper mandible dark grey with horn coloured base, lower mandible horn in colour. Eye brown. Female-as in male but blue markings replaced by green; green/yellow forehead, forecrown and cheeks.
male-paler green in colour; purple/blue on lower back and rump paler. Female-paler green in colour, particularly on breast.
In general duller than adults; in young male blue markings are mixed with green.
Calls are described as distinctive; high-pitched notes or soft, wheezing sounds in flight or while perched.
Lexicon of Parrots
Internet Bird Collection http://ibc.lynxeds.com/
BirdLife International http://www.birdlife.org/datazone/species/index.html?action=SpcHTMDetails.asp&sid=1618&m=0
ML Media Collection Catalogue 75060, Dusky-billed Parrotlet Forpus sclateri, Marantz, Curtis, Madre de Dios, Peru, Jul. 28 1994, Cornell Lab of Ornithology
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.
Parrots in Aviculture, Low, 1992.