Oriental Pratincole 

Breeds in Indochina, East Asia, northern Philippines and some sites around India and Sri Lanka. Winters in Southeast Asia to Australia.
Found in Freshwater marshes, open country, coastal lagoons throughout Singapore during the migratory season, especially at known raptor watching sites. Sometimes seen at freshwater puddles, typically temporary ones that form at construction sites or grassfields in places like Seletar and Jurong.