The 8 Most Dangerous Snakes in North America

Cottonmouth

The cottonmouth is the only semiaquatic viper. Found in the Southeastern US, its venom causes severe damage. Thankfully, CroFab antivenom keeps fatalities low.

Timber Rattlesnake

Timber rattlesnakes are large, with potent venom and long fangs. They’re patient and known for their rattle, giving warnings before they strike.

lack Diamond Rattlesnake

The black diamond rattlesnake has 7 subspecies with highly toxic venom. Found across western North America, it’s known for its dangerous bite.

Tiger Rattlesnake

Named for its stripe pattern, the tiger rattlesnake has the most toxic venom in the Western Hemisphere. Luckily, its venom yield is low, making bites rare.

Copperhead

The copperhead is known for frequent bites due to its “freeze” defense. Despite being the most common pit viper to bite humans, its venom is relatively mild.

Eastern Coral Snake

The eastern coral snake has powerful venom, but it rarely injects a lethal dose. It’s highly venomous but rarely causes fatalities due to its reclusive nature.

Western Diamondback Rattlesnake

With Western diamondback rattlesnakes, you get a large venom yield. Its bites can cause severe symptoms, including heavy bleeding and muscle damage.

Prairie Rattlesnake

The prairie rattlesnake is less dangerous than other rattlesnakes. Found in the Western US, its venom contains neurotoxins but causes fewer fatalities.

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