Sorry for the slow response, but I have not checked the forum for a while. The snake is a
Xenochrophis flavipunctatus, sometimes referred to as a "Common Keelback". This one should be considered harmless and the most harm they can inflict is some swelling at the point of a bite. There is a very closely related species that looks almost identical and it should also be considered as harmless.
Not all Keelbacks are harmless. There is one genus,
Rhabdophis, where the species look more harmless than the Keelback in the picture from the previous post (
Xenochrophis flavipunctatus), looking like a European Grass Snake or American Garter Snake in their shape, scales and size, but the snakes of that genus should be considered potentially dangerous. Some of these snakes are docile, but the one to be especially careful around and should be considered dangerous is the Red-necked Keelback-
Rhabdophis subminiatus.
Rhabdophis subminiatus:
Late last year, this species of snake put an 11 year old child in ICU for nearly a week and in a normal hospital ward for an additional two weeks. For some reason, the venom appears to have a stronger effect on people of European or half European/half Thai descent than normal Thais; although, I have heard of at least one Thai that had a bad reaction to the venom. The 11 year old child mentioned was half European/half Thai.