8. New Hampshire
There are 11 snake species native to New Hampshire, the next one on the list of states with no or least poisonous snakes in America and only one of them, the timber rattlesnake (Crotalus horridus) is venomous. Of these 11 species, 5 are considered to be highly endangered in New Hampshire, with the greatest need of conservation, and protected by law, among them being the timber rattlesnake. Main threats to these snakes are loss of habitat, gravel mining, and killing by humans.
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