This is one of the green vipers at the Snake Temple in the south part of Penang Island. The temple used to be in the midst of the jungle and the snakes came in on their own - as disciples of the patron diety, Chor Soo Kong. The triangular shape of the head indicates that it is poisonous. It is thought that the thick smoke from the incense keeps them somewhat sedated. At night the priests stuff the cracks around the doors with newspapers to keep them inside.