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Thamnophis sirtalis sirtalis
About 1-1/2' long, grayish-black on top with reddish-brown sides, white jaw.
You're welcome! If you agree with the suggestion (as have four other users: "+4"), then why not fill in the common name and scientific name spaces with those in the suggestion? That way your spotting will be regarded as identified by the Projected Noah database. :-)
Thank you, I was thrown by the slight pinkish belly. The reference link was very helpful, thank you!