Moult by the Galah Cacatua rosiecapilla in the Wheatbelt of Western Australia.

Primary moult by the Galah in the Western Australian wheatbelt extended over 155 to 185 days in 1972. Immature nonbreeding birds started earlier (October) and took longer (185 days) than adults. Breeding birds started to moult in November after most progeny were feathered but before they had fledged. Females took less time to moult than males, but started later so that both sexes (immatures and adults) tended to finish the moult at a similar time, in April. Primary No. 6 was the first to be renewed, and moult proceeded ascendently and descendently, simultaneously.

>> Download Complete PDF | File Size: 1.1MB