Trimeresurus macrops – Large-eyed Pit Viper
The Large-eyed Pit Viper (Trimeresurus macrops) is a fairly widespread species in Thailand, and can be fairly common in the right habitat.
More details will follow once I have more time on my hands (which could take a while), but here follow some images to keep you entertained.

Large-eyed Pit Viper (Trimeresurus macrops) female in situ next to pink eggs from a water snail in Pak Chong, Nakhon Ratchasima, Thailand