1. Tiger rattlesnake (Crotalus tigris)
LD50: 0.06
The number one of the most venomous rattlesnake species in the world is the tiger rattlesnake. This snake inhabits predominantly drier environments, rocky arid canyons and savannahs and grasslands on rather higher altitudes from 1,000-1,500 meters above sea level. It is present in southern parts of Arizona and in Sonora desert. Tiger rattlesnakes are recognizable for their small heads, and are considered to be rattlesnakes with the smallest heads and big rattles. The average length is around 24 inches, with males being slightly larger. They are nicely camouflaged into the environment as their coloration varies. Interestingly, tiger rattlesnake is the only rattlesnake to have crossband pattern on the ventral side (belly) of the body. On the dorsal (back) side they have darker bands. This snake produces a very small portion of venom (about 10 mg), but it is highly toxic.
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