Reminded by BoonSeng. So far, I only encountered the OWS at Kent Ridge tree-top walk.

Reference: http://ntri.tamuk.edu/snakesoftheworld/Asia/seasia.html

Oriental Whip Snake (Ahaetulla prasina)
- mildly venomous yet docile
http://www.ecologyasia.com/Vertebrat...whip-snake.htm


Blue Malayan Coral Snake (Maticora bivirgata)
- small & shy
- highly venomous front-fanged
- its neurotoxic venom can cause death
http://www.ecologyasia.com/Vertebrat...oral_snake.htm


Banded Malayan Coral Snake (Maticora intestinalis)
- small
- powerful neurotoxic venom
http://www.ecologyasia.com/Vertebrat...oral_snake.htm