Gary,

I worked at a remote mountain facility and would see rattle snakes in the morning. They slow down when it gets cold. I was always surprised finding one in the path almost stepping on them. They are just so invisible. One day at the laser lab, it sounded as though the power transformed was going out. A very high pitched buzz. Certainly not like the snakes in the Cowboy movies. I was much more careful after that. At least I tried to be. Never did any good. So it was snakes or wild boar. Wild bord sound like thunder, but a dark cloud moving across the ground. There wer lots of ancient oak trees, and the boar would mostly come at night.

Rich