Quote Originally Posted by KLG View Post
Actually, the larger python species (Burms, rocks, retics) have been shown to metabolically thermoregulate by twitching their muscles to raise body heat (accomplished through burning calories)...but smaller snakes just don't have the muscle mass to successfully accomplish this throughout the duration of incubation, making supplemental heat necessary.

It sounds like you're saying they do it, but they just don't do it enough to successfully incubate, in which case I have never disagreed with that. I was just saying that they can produce heat by twitching and do that while incubating, not that that is all they do to heat the eggs. Thats all.