I have been checking Walkers temp this fall to see at what temperature he returns back to his heated house to warm up. It has been a fairly mild fall here until a couple of days ago, today it did not get above 32 F, but it was very sunny, he was out and very active for quite awhile. He ate a lot, (leaves, weeds, mazuri, and a little pumpkin). He has lived outside for several years but I never thought about checking his shell temps. When I can't find a shell temp above 65 F he is ready to get back to the heat soon. He is large and holds his body heat well, even on a cloudy day. Here he is today eating some mazuri