David Northcott 

African Bush Viper

Western Diamondback Rattlesnake

Western Diamondback Rattlesnake

Eyelash Viper

East African Gaboon Viper

Sri Lankan Palm Viper

Mangshan's Viper

Wagler's Viper Striking

Borneo Eyelash Viper Striking

Eyelash Viper

Canebrake Timber Rattlesnake

Mexican West Coast Rattlesnake

Brazilian Rattlesnake

African Bush Viper

East African Gaboon Viper

Formosa Island Cobra

Palestine Viper

Green Mambe

Mangrove Pit Viper

Sri Lankan Palm Viper

Wagler's Viper

Ridge-nosed Rattlesnake