Not to mention, toxins drawn from venomous snakes have been developed to treat medical conditions such as heart disease and arthritis. But you’re probably going to suffer a lot.”As houses, schools, and shopping centers spread across snakes’ natural habitat, unsuspecting people like me increasingly fall victim to venomous snakes. Snakes 101Be aware that venomous snakes can be close by even though you don’t see them. Similarly, several species of harmless water snakes are frequently mistaken for venomous water moccasins. Know your snakesTexas is home to four venomous snakes: copperheads, rattlesnakes, water moccasins (aka cottonmouths), and coral snakes.