Reptiles and Amphibians - Wind Cave National Park (U.S. National Park Service) Rattlesnakes are a reptile commonly found in the park. NPS photo. Snakes, however, thrive on the prairie. In the warmer months, it is common to see a snake on a trailside, basking in the road or on a rock, or creeping through the undergrowth of long grass. Garter snakes and milk snakes are small species that are often seen around the visitor center. Bullsnakes are also often seen around the visitor center and parking lot, and can grow up to four feet long. This is South Dakota's largest snake. The only venomous snake found in the park is the prairie rattlesnake. Visitors are urged to use caution when hiking, keeping aware of their surroundings. Although rattlesnake bites are rarely fatal, they require medical intervention.
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