 The true tree snakes, by which I mean the vine snakes and things like that, they have long tails which are prehensile. Now, prehensile serves as a limb, which means they can wrap around things and anchor it. So, the ideal way of moving from a branch to another distant branch is to reach out. Now, you would do it by holding on to one branch and reach out to get a secure grip on the other before you let go. Well, a snake with a long prehensile tail