Could a Snake Eat a Gecko?

[Bandit]

Many snakes eat other reptiles. As was stated, those snakes you mentioned don't solely eat rodents - they are just the easiest food source which has all the nutrition that our snakes need. Would it happen right away? Maybe not. However, I would bet that if the lizard/gecko is small enough for the snake to eat, that the snake will try at some point or another.