Eastern Diamondback Rattlesnake - Crotalus adamanteus
This species has the reputation of being the most dangerous venomous snake in North America. While not usually aggressive, they are large and powerful. Studies mention a mortality rate of 30% and that some victims have died within a matter of hours. In proportion to its length, it has the longest fangs of any rattlesnake species, with calculations leading us to expect that an 8-foot specimen would have fangs with a total length of over one inch.