After a dog disrupted the overwintering process of an eastern box turtle hatchling last week, we were faced with the dilemma of how to put him/her back and allow natural overwintering or brumation to take place.
I tried to research methods others have used to introduce hatchlings into late season brumation, but couldn’t find out very much. So, I crafted my own process based on careful thought and intuition based on my many years as an amateur herpetologist. My plan was to house the hatchling within a paper tube that would deteriorate within the ground, yet afford the little turtle some breathing space until he acclimated.
We cooled the turtle to 50 degrees overnight. The next day I dug a hole next to a brumating adult so I could be reasonably confident this was a good spot. Since they can’t dig very well, hatchlings likely brumate under leaf litter. But I wasn’t comfortable just placing the little guy under leaves that late in the season. Since most adults brumate at a depth of 10 centimeters or less (about 4 inches), I placed the hatchling at that depth. I decided to use a paper tube plugged each end with soft detritus and some breathing space in the middle.
I put the turtle in the tube and placed the tube at a 45 degree angle within the hole. This angle would allow him to dig deeper if need be or crawl out if he wanted to. I also placed an Onset temperature logger in the hole at 10cm to record temperatures all winter. As I’ve reported in the past year, I’m currently involved in a study of box turtle brumation which includes recording soil and air temperatures at turtle overwintering spots around the sanctuary.
I’ll monitor the young turtle throughout the winter since I don’t want the tube to collapse and prevent his emergence in the spring, assuming that he makes it. But I sure hope he does. I’ll keep you posted!
This post was contributed by Wellfleet Bay volunteer and box turtle researcher Tim O’Brien.