Molt and plumages of Eastern Rosellas Platycercus-Eximius

Wyndham, Edmund, Brereton, John L. and Beeton, Robert J.S. (1983) Molt and plumages of Eastern Rosellas Platycercus-Eximius. Emu, 83 4: 242-246. doi:10.1071/MU9830242

Author Wyndham, Edmund
Brereton, John L.
Beeton, Robert J.S.
Title Molt and plumages of Eastern Rosellas Platycercus-Eximius
Journal name Emu   Check publisher's open access policy
ISSN 0158-4197
Publication date 1983-12
Sub-type Article (original research)
DOI 10.1071/MU9830242
Volume 83
Issue 4
Start page 242
End page 246
Total pages 5
Place of publication Collingwood, VIC, Australia
Publisher C S I R O Publishing
Language eng
Abstract Adult Eastern Rosellas have a single post-breeding moult each year, from December to May. This moult is complete except in some bids, mostly females, that defer moult of outer primaries until the following year. Birds fledge in juvenile plumage, pass into pre-adult plumage when two to six months old with a moult of the head and body feathers and pass into adult plumage when twelve to eighteen months old with a complete moult. Replacement of primaries starts with middle primaries and progresses inwards and outwards from this focus. Average duration of primary moult is 114 days. A major difference between Eastern Rosellas and the taxonomically related Budgerigar Melopsittacus undulatus is that Eastern Rosellas moult regularly after breeding, while Budgerigars moult continuously, even when breeding. Budgerigars moult into pre-adult and adult plumages at a younger age than do Eastern Rosellas.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Geography, Planning and Environmental Management Publications
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Created: Thu, 23 Dec 2010, 09:16:53 EST