The Reddit user believes the skins belonged to rat snakes, a common, non-venomous species in the region. "They all appear to be rat snakes, which are not venomous, super common in North Carolina.

especially copperheads and rat snakes in central Alabama. “I would say early to mid-April until October/early November is about when you’re most likely to see a snake in Alabama,” Mark Hay ...

Corn snakes, also known as red rat snakes, are among the friendliest ... these non-venomous snakes are native to the southeastern and central United States. Beyond their role as beloved pets ...