I'm in East Texas and over run with Cotton Mouths and Copper Heads, along with rat snakes and a few other non toxic snakes. Two years ago, they where everywhere. I killed over 20, my wife got a dozen, my mom got almost as many, and one of my dogs was bit two different times by copper heads. I saw the first time it happened, and we found the body of the second, along with where it got her. We also found a couple of dead rat snakes in the dogs yard, and one small copper head near the wood pile that either chickens or guineas killed. Last year we put mothballs everywhere. We bought boxes and boxes of them from Walmart and the Dollar Store. All last year, I only killed three snakes and that was the grand total for all of us. Another thing that we did was get some cats. We have chickens, which means we have lots of food for mice. That really bad year was also a bad year for mice. Last year, the mice where severely reduced thanks to the cats and dozens of mouse traps. Chickens love to eat dead mice!!!! Once it warms up again this year, we will be putting out moth balls again. They stink, but that's probably a big part of what the snakes don't like. We are also looking for more cats. I've come to the realization that crazy cat people are on to something!!!