10. Massasauga, ground rattlesnake, black snapper, spotted rattler, swamp rattlesnake, (Sistrurus catenatus)
LD50: 2.9
This snake ranks 10th in our list of most venomous rattlesnake species in the world. It inhabits a wide range of habitats, from Texas to Canada, preferring wetlands from fall to spring, and then moves to drier uplands during summer. Since it inhabits a wide range of territories, it has been given many common names. It is rather a short species, with the average length of 19-27 inches. Their coloring offers a nice camouflage, being grayish with darker brown blotches and two rows of lined dots of darker color. Its name means “the great river mouth” in the Ojibwa language and refers to marshy grasslands around river deltas that these snakes inhabit.
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