What I meant to say is that its not because of weather, but because tracks can be seen, most animals like birds that would be noisy in warmer seasons are gone, and the crunch of snow when you step, especially if your heavy. if one were to stand still or use camo, I can see that, but if your lugging loot or a body in snow, your making yourself a larger target, tracks could be odder if you try to drag anything or move at a crawl, if your bleeding from an encounter your leaving a good trail that would be glaring in snow.
Thats the case I was stating before.