Almost stepping on a snek in Texas -- off the pavement, anyway -- is like almost stepping on a stick or leaf.
I've shooed many an adolescent rattler off the road where they'd fallen asleep basking in the warm sun, and water moccasins off the MUP near the river. They come out after dark to enjoy a bit of warmth, then go into semi-hibernation as the nighttime temperature cools off. A squirt from a water bottle does the trick with rattlers. Doesn't work with water moccasins because... water. They're like "What? Already had my bath. Piss off."