In central South Carolina. (And, just in case you’re wondering, no, I didn’t kill it. I found it in the road while walking the dog.)
Do snakes have ids?
It may be a juvenile with a different pattern from an adult.
Images are consistent with a garter snake Thamnophis sirtalis
Looks more like an eastern glass snake: glass snake - Search See second from left at the bottom.
Glass snakes, Ophisaurus, are legless lizards with eyelids, ear openings and a lateral groove running most of the length of the body. The dead snake on the bin cover lacks all of these features.
Agree, Google images for garter snake: http://www.google.com/search?hl=en&site=imghp&tbm=isch&source=hp&biw=1507&bih=809&q=checkerboard&oq=checker&gs_l=img.1.2.0l10.1122.5022.0.73220.127.116.11.0.0.0.49.218.104.22.168...0.0...1ac.1.12.img.PuY1OgHBVAA#hl=en&site=imghp&tbm=isch&sa=1&q=checkerboard+pattern+snake+-rattle&oq=checkerboard+pattern+snake+-rattle&gs_l=img.12...0.0.2.54822.214.171.124.0.0.0.0.0..0.0...0.0...1c..12.img.IYGYq-S_uIY&bav=on.2,or.r_qf.&bvm=bv.46340616,d.eWU&fp=c60c501e078447ff&biw=1507&bih=809
Concur. While Garter Snakes typically have a distinct light mid-dorsal stripe, this linkshows a “checkered” pattern variation from the subject area.