You can imagine there's some selective pressure for a snake to evolve, maybe not from itself, but perhaps from its mate or something. Chris - A good corollary is spiders, isn't it? We know that spiders are vulnerable to their own toxins. A female can bite the male and kill the male with their venom. read more
The answer seems to be yes, they are susceptible to their own venom. If it’s injected into their system they can be susceptible to it, but some scientists have also found anti-venom inside snakes. read more
John B. Virata keeps a ball python, two corn snakes, a king snake, and two leopard geckos. His first snake, a California kingsnake, was purchased at the Pet Place in Westminster, CA for $5. His first pet reptile was a green anole that arrived in a small box via mail order. read more