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Blue-backed Parrot  

Also Known As: Muller's Parrot, Azure-rumped Parrot
 
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Blue-backed Parrot (Tanygnathus sumatranus)

Credit: (c) Jonker/Innemee Araproject | http://www.araproject.nl
 
photos Photos videoVideo 1
 
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Did You Know?
The Blue-backed Parrot is less common than the Blue-naped Parrot (which is near-threatened) but is not considered in danger.

Species Profile
Genus:
Tanygnathus

Species:
sumatranus

Size: Adult Weight:
32cm (12.5 in) 230-330g (8-11.5 oz)

Races including nominate:
six: T.s. sumatranus, T.s. sangirensis, T.s. burbidgii, T.s. everetti, T.s. duponti, T.s. freeri

Colourization Adult: Large green parrot, plainly coloured, lacking markings.
T.s. sumatranus: both adults-blue rump and lower back; lesser and primary coverts green, marked with blue. Red bill in male, white in female. Eye yellow. T.s. sangirensis: both adults-as in sumatranus, but more blue on bend of wing and lesser wing coverts. T.s. burbidgii: both adults-deep blue rump and lower back. T.s. everetti: both adults-as in burbidgii but head darker green; mantle edged dark blue; rump and lower back darker blue. Eye red. T.s. duponti: both adults-as in everetti but more yellow neck in a noticeable collar. T.s. freeri: both adults-as in everetti but more yellow in general; paler blue on mantle.

Colourization Juvenile: As in adults.

Call: Calls described as loud and barking; also disyllabic call followed by upslurred, nasal screeching note; musical quavering shriek and single, nasal-sounding squawk. While perched gives single loud notes.

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Recent Academic Research: Google Scholar - search results

 

Content Sources:

The Tanygnathus Society http://www.thetanygnathussociety.org/

Lexicon of Parrots http://www.arndt-verlag.com/projekt/birds_3.cgi?Desc=E100.htm&Pic=100_1.JPG

BirdLife International http://www.birdlife.org/datazone/species/index.html?action=SpcHTMDetails.asp&sid=1444&m=0

CITES http://www.cites.org/eng/resources/species.html

xeno-canto Asia http://www.xeno-canto.org/index.php

Internet Bird Collection http://ibc.hbw.com/ibc/

Parrots: A Guide to Parrots of the World, Juniper and Parr, 1998.

Parrots of the World, Forshaw and Cooper, 1977, 1989.

Parrots of the World, Forshaw, 2006.

Parrots in Aviculture, Low, 1992.