While most snakes and lizards in North America are not poisonous, a few species can seriously injure or kill someone with their venom if the bite isn't treated quickly. They include the rattlesnake, copperhead, cottonmouth, coral snake, Gila monster, and Mexican bearded lizard.
There are many lizards that are quite harmless to people ( in fact most of them) but you can still find ones that are unusually furious and deadly , hope this helped :)
