Nice to have you with us. I have an email in to the Ohio Dept. of Natural Resources. Trying to get info. on possession laws with regards to Thamnophis. Here are the native garters of Ohio. Eastern Garter snake (Thamnophis sirtalis sirtalis), Plains garter snake (Thamnophis radix ), Butler’s garter snake (Thamnophis butleri), Shorthead garter snake (Thamnophis brachystoma), Eastern ribbon snake (Thamnophis sauritus sauritus), northern ribbon snake.
As soon as I get an answer I post it up.
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Garter Snake Forum - Garter Caresheet