Colour mutation in common starling

As a recent subsriber to this list, I have been enjoying the 
discussion and the reports of sitings and trips. Members of the list 
may be able to help with a question that has perplexed me for some 
months. 
Last summer while walking around Lake Wendouree in Ballarat I saw a 
flock of starlings on the grass on the foreshore. One in particular 
caught my attention. The upper part of its body was essentially 
white/silver - this included head, chest, back. From memory the wings 
were dark. Suffice to say this individual stood out from the rest. It 
was clearly a starling.

A report in the nature pages on the local paper two weeks later 
reported a similar sighting in the same vicinity.

I know they can get a metalic sheen but this one was definitely 
"pied". 

Any thoughts / comments?

Geoff McArthur
Ballarat East