They are running out of wetlands,biomes to live in.
Many are in trouble. Both eastern and western diamondbacks, the timber rattler in some areas, and the massasauga.
Yes, the eastern massasauga and the timber rattlesnake are both found in Indiana.
Numbers and population trends for the Eastern Massasauga are not known, but the IUCN lists them as a species of "least concern" (they are not threatened or endangered).
In Indiana, the venomous snakes to be aware of are the Eastern Massasauga rattlesnake and the Timber rattlesnake. It's important to be cautious and avoid these snakes if encountered in their natural habitat.
The Atlantic Ocean has no rattlesnakes. They are terrestrial animals. However, a few species live near the Atlantic including the timber rattlesnake, the eastern diamondback, the massasauga and pygmy rattlesnakes.
No rattlesnake or any other venomous snakes are found in Newton County, IN. The only venomous snake found in the northern half of Indiana would be the Eastern Massasauga rattlesnake and they are rare and endangered, but none in Newton County.
The eastern diamondback is endangered in some states, like North Carolina and Louisiana, but fairly common in others.
There are two genera of rattlesnakes. Most belong to the crotalus genus. However, there are two species - the pygmy rattlesnake and the massasauga that belong to the genus sistrurus. Most are generally smaller in size than the crotalus species and have large plates on the top of the head rather than small scales.
The full life span of massasauga rattlesnakes can last up to 14 years but in captivity they have live for up to 20 years.
The eastern diamondback is threatened over much of its range, and is endangered in NC. Habitat loss, and killing of these snakes by humans are the biggest reason for their threatened condition.
Just off memory, all but Maine, and Alaska. I think all the others have at least a Timber rattler or Eastern Massasauga. Rattlesnakes were extirpated from Rhode Island in the 1970's.
It isn't poisonous. It IS venomous tho.