Large-eyed pitviper 
Large-scaled Pit Viper 
Large-scaled tree viper 
Lebanon viper 
Malabar pit viper 
Malayan Pit Viper 
Mangshan pitviper 
Massasauga snake 
Midget Faded Rattlesnake 
Mohave Rattlesnake 
Mojave Desert Sidewinder 
Mountain Pit Viper 
Neotropical Rattlesnake 
Northern Cottonmouth 
Northern Pacific Rattlesnake 
Nose-horned viper 
Osborne's Lancehead 
Peringuey's desert adder 
Persian horned viper 
Philippine pit viper 
Prairie Rattlesnake 
Puff adder 
Pygmy Rattlesnake 
Rainforest hognosed pitviper