Sometimes called a Hornworm, the caterpillar for the Tersa Sphynx moth feed on weedy plants and is common in South Carolina.
The Tersa Sphynx Moth Caterpillar

Benny Mazur [CC BY 2.0] via Wikimedia Commons
Sometimes called a Hornworm, the caterpillar for the Tersa Sphynx moth feed on weedy plants and is common in South Carolina.