Prairie Rattlesnakes are the only venomous snakes in South Dakota. They are rarely seen at Jewel Cave National Monument but are known to be present.
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Prairie Rattlesnake Crotalus virdidis
South Dakota’s only species of venomous snake.
A large, heavy-bodied species of snake, with adults ranging from 36–50 inches in length.
These are ambush predators and will wait until prey move within striking distance before biting it and injecting its venom.
Identification
The background coloration is light gray, or light brown with dark brown spots inside of white rings running the length of the body.
White rings fade towards the tail and turn into bands.
They have elliptical pupils and a heat pit located between the eye and the nostril that lets them to use thermal senses to find prey.
Diet
Primary diet is rodents, birds and lizards and other snakes.
Interactions with other animals
Prey to foxes, coyotes, weasels, and most birds of prey.
Last updated: January 9, 2024
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Contact Info
Mailing Address:
11149 U.S. Hwy. 16
Building B12
Custer,
SD
57730
Phone:
605 673-8300
The main phone line connects visitors with staff at the visitor center. Throughout the year, the phone line is monitored by staff on a daily basis, excluding holidays and days with limited visitor services. Please be advised that after-hours messages are not taken on the system; visitors are encouraged to call the visitor center during normal operations and speak with a park ranger for assistance.
