An average of 5000 native venomous<unk>  are reported to US poison centers annually
In the United States,<unk>  can be organized into Crotaline (Pit Vipers) and Elapidae (Coral<unk> s)
Crotalidae family also includes rattlesnakes, Sistrurus and Agkistrodon species (water moccasins and copperheads).
Risk Factors: "The 'T's" Testosterone, Tequila, Tshirt, Tattoos, Toothless, Teasing, Trailer park, Truck<unk>  venom is a  mixture of proteins, peptides, lipids, and metal ions.
Many bites can be "dry bites" where no venom is released, about ~1/4
Snake bites
Hymenoptera stings 
Spider bites
Mammalian bites
Lizard bites
Closed fist infection 
Shark bite
Dog bite