ajohn

Dylan, you were right first time. This is a male White-shouldered Starling - you can even see the white 'shoulders'. The head pattern and bill colour also fit White-shouldered rather than Chestnut-tailed. And of course the tail is dark with a paler tip, rather than chestnut!

I'm not sure whether it has been dyed, or whether it is just a factor of the lighting on this bird or perhaps dirt. Dyed individuals are usually brighter than this, and are usually seen in spring rather than winter. A date and location would be useful.

ajohn

It's not a strange time to see White-shouldered Starling. They regularly winter in small numbers at Deep Bay and Kam Tin, and is certainly a more likely sighting that Chestnut-tailed or a hybrid (as far as I know, hybridisation has never been found in these species). Having said that, we now have the information that this bird was photographed in late April - a time when there are White-shouldered Starlings breeding at Kam Tin and probably migrants around as well.
The features on this bird clearly fit male White-shouldered, possibly with some staining or dye in the plumage.