6. Tiger rattlesnake (Crotalus tigris)
LD50: 0.06
This is an American species of vipers, which inhabits desert scrubs and rocky, arid environments of the southwestern United States and Sonoran desert in Mexico. The average body length is rather small, around 60 centimeters, and they are recognized by their small heads comparing to body size. Their bodies are covered with darker bands on lighter base which is usually blue-gray or brownish-orange.
