If you see snakes it is usually in droughts. That is when they leave their natural habitat and look for water. Here is the address and phone number of the Texas Herpetological Society in San Antonio. They will be able to answer all your questions about snakes, where and where not you can find them.
1810 W Mulberry Avenue
San Antonio, TX 78201 - View Map
Phone: (210) 732-3507
If you have any other questions concerning real estate, you can contact me anytime.
Joyce Klein Realtors