Rattlesnakes: The United States is home to sixteen different species of rattlesnakes. The characteristic sound these crawling reptiles make when they perceive danger is what gives them their "rattle" sound.
Copperheads: More people have been bitten by copperheads than by any other kind of venomous snake.
Cottonmouths: Venomous snakes of the semiaquatic variety are called cottonmouths, or water moccasins. Their white inner lips, which they display prior to an attack, are the source of their name.
Coral Snakes: Coral snakes are distinguished from non-venomous king snakes by their characteristic multicolored appearance. Look for bands or rings around their bodies that are red, yellow, black, or white.
Western Diamondback Rattlesnake: Typically found in the Southwest and northern Mexico, this one can be identified by the diamond pattern that runs over its back.
Eastern Diamondback Rattlesnake: The most lethal of all venomous snakes in the United States, the Eastern diamondback rattlesnake, is not something you want to encounter head-on.
Timber Rattlesnake: What they seem like: They have thick black or brown stripes running the length of their back, and their color varies from yellowish brown to dark gray.
Eastern Coral Snake: This particular species of coral snake is only found in lowland and coastal areas with milder temperatures. Though fortunately not many of their bites are venomous, it's still not a chance you should accept.