I'd be very interested to know about the "hibernaculum of differing depths". Are the pythons sealed in or are these open to the air? Do Burms have much of any sense about regulation once they get cold? Did the researchers also offer secure hides above ground? I know ball pythons will take security over a survivable temp any day so if the Burms are using the holes it might be just because they didn't offer them a cold Buick trunk to crawl under and freeze back in October. Is there a pond (now frozen)? I have less (but some) experience with Burms than balls but maybe like the ball who will pick security the Burm will pick water over the sort of hides modern snakes evolved to use that enabled our native snakes to expand into the temperate zone. I'm just not sure a tropical snake offered a full range of terrain would have the thermoregulation instincts to pick the deepest and least drafty hole the researchers dug.
I see zip code 29808 is calling for a low of 14 deg F on Sunday. Long stretch of very cool temps including several days with the mean below 32. Are they really checking on them every day and if so if they are already dead will they end the study and report?
Can anyone find a satellite view of the study site? Are there tracks in the snow, lol?