Classification
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Thamnophis - North American Garter & Ribbon Snakes
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Thamnophis cyrtopsis - Black-necked Gartersnake
- T. c. collaris - Tropical Black-necked Gartersnake
- T. c. cyrtopsis - Western Black-necked Gartersnake
- T. c. ocellatus - Eastern Black-necked Gartersnake
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Thamnophis cyrtopsis - Black-necked Gartersnake
