I always remind people to clear the loose straw from their job sites for several reasons. The first reason is always fire protection. The second is for slip protection. The third and new reason is for snakes!
I live in an area with rattlesnakes among other less dangerous ones. I was clearing out a bunch of loose straw today from the area below the last workshop site. In that process, I came across two snakes who were less than pleased to see me. Neither one was a rattlesnake, I was happy to see, nonetheless, I jumped a few feet when I found them. So, be sure to clear the loose straw away, especially if you live in an area with dangerous snakes!