Pantherophis alleghaniensis, commonly called the eastern rat snake, is a species of nonvenomous snake native to North America.
Transcript (edited for clarity):
RUDY MANCKE:
Hi, this is Rudy Mancke from USC for NatureNotes.
Steve in Dorchester County saw a snake with on it, thought it was a ribbon snake and sent me a picture. A ribbon snake is sort of greenish with yellow stripes from head to tail. This one had dark stripes against the light background.
And instead of being the ribbon snake, it was what is now called the eastern rat snake. I grew up calling it the yellow rat snake. It's typical of the coastal plain. A very powerful constrictor, a good climber, feeds on birds and mammals. But it does have dark stripes from the head onto the tail when it's an adult.