Which reptiles is not poisonous?

As far as I am aware, there is no such thing as a poisonous snake. Many snakes, however, are venomous. (If you bite the snake and you die, it's poisonous. If the snake bites you and you die, it's venomous.) In North America, if it's not a rattler, copperhead, cottonmouth, or coral snake, it's not venomous. The first three are pit-vipers and easy to recognize. They have a triangular head, and pits between their eyes and nostrils. The coral snake is a bit tricky since it looks almost identical to the scarlet king snake. As a general rule, if the snake is red, yellow, and black, give it lots of room. If you are not sure whether a snake is venomous or not, leave it alone. All snakes, including venomous ones, are edible.