South Carolina Department of Natural Resources: “The six venomous species are the coral snake, pigmy rattlesnake, cottonmouth (aka water moccasin), copperhead, canebrake or timber rattlesnake, and the eastern diamondback rattlesnake.” Source
Venom: “The six venomous species are the coral snake, pigmy rattlesnake, cottonmouth (aka water moccasin), copperhead, canebrake or timber rattlesnake, and the eastern diamondback rattlesnake.” (South Carolina Department of Natural Resources)
Habitat: The canebrake of the piedmont and coastal plain is a species of forested woodlands, wooded bluffs near rivers, river swamps and wet thickets. (SCDNR and South Carolina Wildlife Magazine)
"considered a species of concern in South Carolina"
What the sources say
Venom: “The six venomous species are the coral snake, pigmy rattlesnake, cottonmouth (aka water moccasin), copperhead, canebrake or timber rattlesnake, and the eastern diamondback rattlesnake.” (South Carolina Department of Natural Resources)
Habitat: Longleaf pine flatwoods, rolling pine-hills and in maritime grasslands of the lower coast (SCDNR and South Carolina Wildlife Magazine)
Venom: “The six venomous species are the coral snake, pigmy rattlesnake, cottonmouth (aka water moccasin), copperhead, canebrake or timber rattlesnake, and the eastern diamondback rattlesnake.” (South Carolina Department of Natural Resources)
Habitat: They occur in a variety of habitats but are seldom found far from fresh water, such as marshes, swamps and ponds. (SCDNR and South Carolina Wildlife Magazine)
Timber rattlesnake has black chevron-like crossbands, a reddish stripe down the middle of the back and a black tail; Florida Museum says it is the only other rattlesnake likely to be confused with the diamondback in Florida.
Arizona Game and Fish: the western diamondback's tail has alternating black and white bands of roughly equal width, and a thin light stripe runs back and down from the rear corner of the eye to the upper lip.
“The six venomous species are the coral snake, pigmy rattlesnake, cottonmouth (aka water moccasin), copperhead, canebrake or timber rattlesnake, and the eastern diamondback rattlesnake.”
“In South Carolina, cottonmouths typically live in the sandhills and coastal plain regions, but do not enter the piedmont nor mountain regions of the state.”