Spotted bush snake (Philothamnus semivariegatus ) These are very cool snakes. Common but very cool indeed. They are arboreal and green, two things I am a sucker for in snakes. They also have really bright luminous blue skin in between their scales and a bright blue tongue. They feed mainly on geckos and chameleons. Found 2 in my garden this week. Agro when caught and bite like crazy but are totally harmless constrictors. The are very agile and can climb anywhere! i have seen one climb a brick wall! They get killed alot by people thinking they are deadly green mambas or boomslang, what a pity.