Chip
ΜΟΛΩΝ ΛΑΒ&
Their ideal maximum is 90 degrees. Anything over that for a sustained time risks causing neurological damage.
For some reason, they don't have the instinct to move away from a surface that is too hot - they have been known to actually sit on things like bulbs that are so hot they cause burns. You need to get surfaces below 90 if you can.
No!
NO, NO, NO!!! If you are speaking of SURFACES, they can be 105, and even a *tad* higher. They will not "cook" on these, provided there are multiple areas that the snake will feel comfortable (read: hides, even it it's a fold in a paper towel). I don't mean to be a disagreeable ass, but I have rushed my share of snakes, many were corns. The most valuable snakes I have ever bought have always been "overfed" and kept with too hot of a maximum spot temp, according to everyone on message-boards. These 5 new hatchling Tesseras were put in yearling racks with HOT belly heat for digestion. I have temp gunned the snake's bodies on heat as high as 106.7 and they are bigger than any '08 I produced and fed only weekly. I feed these big meals every three days, and they grow like Kudzu. Obviously, I won't continue this regimen once they reach breeding size, but it is AMBIENT temp that burns snake's brains. Not the hot spot. And if your cage is cold, yep, they could fry themselves hugging the hot spot if they need to digest food or have the urge to not go dormant yet... both of which you, the keeper, are also in control of.
But my biggest point is that baby snakes have a lot of ATP action going on in those little new bodies. They are perfectly evolved to transfer rather than store every molecule in every cell. Overfeed an adult, and you will quickly have a fat snake. I have yet to see a fat baby reptile. Only one that looks older. We are not dealing with mammals here. When the last meal is digested, they are "ready" for another. Digestion at normal temps is complete hours/tops one day before they defecate. I wouldn't give this advice to new keepers, but talking honestly with experienced folks, if you have proper ambient temps and a large enough gradient (and hides, hides, hides), you can get that hot spot HOT! I only wish I had a temp gun on me in the South Carolina summer days catching a corn on a flat rock right in the mid-day sun. I bet some of those critters were damn near the temps I like my steak.