Hi Marty,
Sightings and photos of sulphur crested cockatoos with abnormal colorings,
including pink, from various parts of the country get reported in the media
and on the net now and then.
http://www.smh.com.au/nsw/what-happe...27-gog4db.html
http://www.birdsinbackyards.net/foru...sted-Cockatoos
http://enhs.org.au/?p=2414
The usual theory from zoologists is that they have come into contact with a
dye.
Fluoro Pink is a popular colour for marking out groundworks. Perhaps a can
left on a construction site and an inquisitive beak or coming in contact
with the dye on the ground itself?