It’s that time of year again. You are going to start seeing snakes popping up all across the state. South Carolina’s warm climate, diverse ecosystems, and abundance of wetlands make it a natural habitat for a wide variety of wildlife including snakes. Whether you’re hiking in the Upstate, tending a garden in the Midlands, or enjoying the coast, it’s not uncommon to encounter a snake anytime you are outside.
While snakes often have a bad reputation, most species found in South Carolina are non-venomous and beneficial. However, a few venomous species do live here, and it’s important to know how to identify them and where you’re most likely to find them.
This guide will walk you through some of the most common snakes in South Carolina, including what they look like, where they live, and how dangerous (or harmless) they really are.
Eastern Rat Snake (Pantherophis alleghaniensis)
Also Known As: Black Rat Snake
Danger Level: Harmless
Pictures: See photos of the snake here
The eastern rat snake is one of the most commonly seen snakes in South Carolina. Adults are long, often 4 to 6 feet, and jet black with a white chin and throat. Juveniles are gray with dark blotches that fade with age.
Habitat: They thrive in forests, farmlands, and even suburban backyards. They are excellent climbers and are frequently seen in barns, attics, and trees.
Behavior: Non-venomous and non-aggressive, they are beneficial for controlling rodent populations. If threatened, they may vibrate their tail or emit a foul musk, but they rarely bite.
Eastern Copperhead (Agkistrodon contortrix)
Also Known As: Copperhead
Danger Level: Venomous
Pictures: See photos of the snake here
The copperhead is the most common venomous snake in South Carolina. It is recognized by its distinctive copper-colored head and hourglass-shaped bands across a tan or pinkish body.
Habitat: Copperheads can be found in wooded areas, rocky hillsides, and near water sources. They are also often seen in brush piles or leaf litter especially in suburban areas bordering wooded land.
Behavior: Although venomous, copperheads are not aggressive and usually bite only when accidentally stepped on or handled. Their bite is rarely fatal but should always be treated immediately.
Black Racer (Coluber constrictor)
Also Known As: Southern Black Racer
Danger Level: Harmless
Pictures: See photos of the snake here
Sleek, fast, and inquisitive, the black racer is easily mistaken for the black rat snake, but it is typically thinner with a shinier appearance and a white chin.
Habitat: Found statewide, especially in fields, edges of forests, and residential gardens.
Behavior: True to their name, racers are quick to flee. If cornered, they may strike repeatedly, but they are non-venomous. They feed on insects, rodents, and other small animals.
Cottonmouth (Agkistrodon piscivorus)
Also Known As: Water Moccasin
Danger Level: Venomous
Pictures: See photos of the snake here
The cottonmouth is a large, thick-bodied snake found mostly in South Carolina’s wetlands and coastal regions. It gets its name from the white, cotton-like lining of its mouth, which it displays when threatened.
Habitat: Swamps, marshes, ditches, and slow-moving streams or rivers.
Behavior: Cottonmouths are semi-aquatic and excellent swimmers. While they may stand their ground if approached, unprovoked bites are rare. Their venom is more potent than a copperhead’s and medical attention should be sought immediately if bitten.
Corn Snake (Pantherophis guttatus)
Also Known As: Red Rat Snake
Danger Level: Harmless
Pictures: See photos of the snake here
Often mistaken for copperheads due to their color, corn snakes are beautifully patterned with reddish-orange blotches outlined in black over a gray or orange background.
Habitat: They are found in forests, abandoned buildings, fields, and near grain storage areas.
Behavior: Completely non-venomous and docile, corn snakes are popular in the pet trade because they’re gentle, efficient at controlling pests, and not a threat to people.
Eastern Diamondback Rattlesnake (Crotalus adamanteus)
Also Known As: Diamondback
Danger Level: Highly Venomous
Pictures: See photos of the snake here
The eastern diamondback is North America’s largest venomous snake, sometimes reaching up to 8 feet in length. It has dark diamond-shaped patterns outlined in light scales along its thick body. While they are found in the state, they are exceedingly rare. Most people will never see one in their lifetime.
Habitat: More common in the coastal plain and sandy pinewoods of South Carolina. Rarely seen but not absent.
Behavior: They generally avoid humans and use their distinctive rattle as a warning. Bites are serious and require immediate medical treatment.
Brown Water Snake (Nerodia taxispilota)
Danger Level: Harmless (Often Misidentified as Cottonmouth)
Pictures: See photos of the snake here
Large and heavy-bodied, the brown water snake is non-venomous but often mistaken for the cottonmouth due to its size and aquatic nature. It has dark blotches along a light brown body.
Habitat: Found near rivers, lakes, and reservoirs especially in the Midlands and Lowcountry.
Behavior: While they may act defensively if cornered, they are not venomous and pose no threat to humans.
Snake Safety Tips for South Carolina Residents
- Never handle a wild snake. Even non-venomous snakes may bite if provoked.
- Stay on trails. When hiking or working outdoors, avoid tall grass and brush piles.
- Don’t rely on head shape or behavior alone to identify venomous snakes. Learn key markings or consult a local expert.
- Err on the side of caution. Snake bites are nothing to play around with. Treat snakes with respect and avoid getting bitten.
- Call a professional if you find a snake in or near your home. Avoid DIY removal of potentially venomous species.
Snakes Are a Sign of a Healthy Ecosystem
While the stigma surrounding snakes is often negative, they play an essential role in South Carolina’s environment by controlling rodent and insect populations. While it’s natural to be cautious, most snakes in our area are not dangerous and prefer to avoid humans.
By learning to identify common species and understand their behavior, you can stay safe and reduce unnecessary fear. And remember when in doubt, it is best to leave it alone and call a professional.
