Top 10 Largest Vipers 

Cottonmouth:You may not know it, but cottonmouths are actually pit vipers, meaning they can sense heat. They’re one of the largest vipers in the world, with adults growing up to four feet long.

Northern Pacific Rattlesnake:grow to around four feet long, but it’s not uncommon for larger snakes to reach five feet or more. Like cottonmouths, Pacific rattlesnakes are pit vipers with long.

Gaboon Viper: may not be the longest vipers globally, but they’re certainly one of the largest vipers in the world. These heavy vipers can reach lengths of five feet and weigh over 25 pounds.

Russell’s Viper:One of the largest vipers in the world is the Russell’s viper, which grows up to five feet long. Russell’s vipers have very distinct dark brown diamond patterns overlaid.

Puff Adder :One of the largest vipers globally, the puff adder, grows up to six feet long. Puff adders are not to be messed with—they have potent venom and won’t hesitate to defend themselves.

Timber Rattlesnake : live only in eastern North America. They’re closely related to other types of rattlesnake, like the prairie rattlesnake and the Great Basin rattlesnake. 

Western Diamondback Rattlesnake:Though not quite the biggest, western diamondback rattlesnakes are one of the largest vipers in the world.They grow up to five feet long, and some even grow a few inc.

Terciopelo:are a type of viper endemic to Central America. They have thick bodies and can reach lengths of 5.5 feet. Like all vipers they’re venomous and use their highly toxic venom to incapacitate.

Eastern Diamondback Rattlesnake:are the largest vipers in the world. These massive pit vipers grow up to seven feet long and can weigh more than 20 pounds. 

Common European Adder:They may not be the largest vipers in the world, but at three feet long, European adders are no tiny snakes. 

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