For corns I can see where small or no brumation would be the norm. In the southeast there can be 10-11 months of warm weather for the snakes in the wild.

Here in Arizona it can be quite diverse as I live in the high country (5,000 ft) and it does get cold up here......so I brumate my snakes for 4 months as that is the weather outside. Although I only have cal kings now I used to have a bunch of corns, ratsnakes, milks, gophers, rosy boas, etc.... and they were all brumated for 4 months (55-65 degrees). Dark and cool for 4 months, no food, just fresh water. But in the low desert of Arizona there can be 10-11 months of nice weather, so some may not brumate at all.

Kerby...
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Life is like a bunch of fish in an aquarium....we all get along (bonding) until I want to eat you....and I do.