Thats a really interesting point about the cooler temps. When I first got into the hobby, I was led to believe snakes needed high temps or they would get respiratory infections, and could die. I quickly realized this was not true. In fact, my first learning curve was my snakes usually prefer cooler temps. And when I got into tropical snakes, it was the same thing.(they love the OPTION of heat) Here in Ontario, snakes are most active anything between 0 degrees and 15 degrees(I have found eastern garters out in November, with snow on the ground.) Anything over that, they are very very hard to find.