Dear ddavid,
Thank you very much for your very prompt reply. It did help me get some insight to move things forward.
I happened to be into a debate between an European ornithologist and an European orni-theologist. They shared very different views regarding the status of Milky Storks in Singapore. You know ornithologists are always right yet orni-theologists are never wrong. I tried to make some endeavor to search for an answer.
I got the following information from the internet.
Both storks (Milky Storks & Painted Storks) have been sighted during the last few years in Singapore, mainly in the Sungei Buloh Wetland Reserve. Their status here is debatable – either vagrant or escapee.
KC Tsang has encountered quite a few specimens in Sungei Buloh that are possible hybrids of the two species. This has been confirmed by David Li, Waterbird Conservation Officer with Wetlands International. David believes that it is possible that these birds could be one of the free flying hybrid.
I would relay your view and the internet findings to them. It may worth another research project!!!!