i grew up on southern CA. rattlesnakes and black widow spiders were just a fact of life. we learned young where to step and where to put our hands!
but...years ago, in an effort to pacify the loons in CA, Camp Pendleton became a nature preserve. nothing could be killed except the mice unless there was no other choice. military even assigned snake wranglers to be called in to relocate snakes that were a problem. pretty soon, snakes were a problem everywhere. i don't know that anything has changed there.
it did become a distraction. we were more concerned about the constant rattling in the brush, than with the big gunny that was going to stomp on us if we messed up the exercise.
so...live and let live....up to a point....
It was a pain. It seemed like every other day on the range we had to stop firing because a deer was down range past the burms. Of course the deer never slowed down some of my mortarman buds.