I have seen absolutely no evidence to convince me that ALL snakes NEED a temperature gradient, either in captivity OR in the wild. Snakes need to be kept warm. That's it. I also know MANY breeders who keep several different species of snake in a very warm room with no temp gradient, and the snakes are just fine. I also have a room that stays between 80 and 84 degrees ambiently, and I keep several snakes in there, and they are also doing just fine. (I'm talking corns, colombian boas, macklotts, spotties, even a blood.... no problems with ANY of them.) Having a temp gradient can be ok, but as long as the snake is kept warm, it will be fine. If it needs to cool off, there is a water dish.
- Ken LePage