|To:||Jack Shapiro <>|
|Subject:||Sulphur-crested Cockatoos Colouration|
|Date:||Mon, 27 Oct 2003 18:04:05 +1100|
Here's a list of replies i got to my initial posting...i'm still unconvinced about this colouration:
Sender Sighting Location Suggested Cause
Peter Fuller(myself) Fyansford, Geelong, VIC Wanted to stand out in a crowd
Jill Dark Cairns/Atherton Tablelands,QLD Feeding on Red Soil
Philip Veerman No sighting Wood pulp from nest excavating ( educated guess)
John Reidy Leeton, NSW Bathing in puddle of very muddy red water (visibly muddy)
Duncan Fraser Gippsland, VIC ??????????????????
Annabel Ashworth/Hoskins Tamworth, NSW Molasses from farmers feed supplement blocks turning feathers pink.
Alan Gillanders Atherton Tablelands, QLD Staining from red, tropical soils.
Jack Shapiro Mosman, NSW
Heres some images of the bird i saw down at Fyansford:
Please let me know if you have troubles accessing this link.
On Thursday ( 23/10/03) while walking at Balmoral Beach (Mosman, NSW), I observed a group of 4 Sulphur-crested Cockatoos feeding on grass roots on the lawn. One of them was had a light brown colouration to most of it feathers except the head. In bright sunlight it looked brown, but perhaps under lesser bright conditions it may be viewed as "pinkish". The bird itself looked exactly like the other cockatoos in its features, not like a hybrid. I have seen hybrid of Sulphur-crested Cockatoos and Galahs, and this was not one of them. The bird didn¹t look dirty, but at the interface between the coloured and white regions of the plumage , the colouration didn¹t look natural. This may well be an example of what Peter Fuller suggested a phenomenon related to nesting.
Recently there has been correspondence on this type of observation in birding Aus, with Peter Fuller initiating the subject (Peter Fuller ; [BIRDING-AUS] Sulphur-crested Cockatoos colouration- 27, 28,29 August 2003).
What is curious is that such colouration has only been reported this year, and on other different individuals of this species, at very diverse locations. Could the dry weather this year be responsible in so indirect way ?
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