I vaguely recall reading something about sub-sonic and super-sonic and air temperature in winter but I can't remember what the relevance was. Interesting stuff though. Anyhow, my buddy told me an interesting thing about snaring Varying Hare is that when the temperature gets down around 0F you have to make the loop bigger because the bunny's ears are frozen. Interesting eh. I wonder how they can let them freeze and thaw without falling off like a true rabbits would. The other thing he mentioned was to set the snare higher off the ground when there has been enough snow that there is no longer food near the ground as the rabbit will then run with his head up higher. What else? Oh yeah. Not so much luck on a full moon as they can see the snare. Much to learn from such activities I think, that you might not learn about these fellow creatures otherwise.