2. Maine
Nine non-venomous snake species inhabit Maine. The only venomous snake found in Maine is the timber rattlesnake (Crotalus horridus), but according to some sources not even this snake is present in Maine. Timber rattlesnake did once inhabit Maine and Rhode Island, but became extinct due to human behaviour which led to the disappearance and fragmentation of their habitats, road constructions and also killing of snakes. Now only one snake species is on the endangered list of animals, also because of habitat loss, and that is non-venomous black racer (Coluber constrictor).
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