Checkered Garter Snake
- kingdom: Animalia
- phylum: Chordata
- class: Reptilia
- order: Squamata
- family: Natricidae
- genus: Thamnophis
- species: Thamnophis marcianus
El Estor
Izabal
Guatemala
El Tigre
Cortés
Honduras
Saltillo
Coahuila- Santa Catarina
Nuevo León- Juchitán de Zaragoza
- Niltepec
Oaxaca- Coba
Quintana Roo
Mexico
Carlsbad- Elephant Butte
- La Huerta
- Mesilla
- Santa Teresa
- Sunland Park
New Mexico- Alamo Heights
- Alpine
- Big Lake
- Boerne
- Brackettville
- Brownsville
- Citrus City
- College Station
- Crystal City
- Eagle Pass
- Electra
- Elgin
- Falfurrias
- Fort Bliss
- Fort Clark Springs
- Fort Davis
- Fort Hancock
- Fort Stockton
- Freer
- Friona
- Graham
- Hebbronville
- Helotes
- Henrietta
- Iowa Park
- Jourdanton
- Kerrville
- Kingsville
- Laguna Heights
- Laguna Vista
- Las Quintas Fronterizas
- Las Quintas Fronterizas Colonia
- Llano
- Lopezville
- Menard
- Mertzon
- Olmos Park
- Paint Rock
- Pharr
- Port Lavaca
- Portland
- Rockport
- San Antonio
- San Marcos
- Terrell Hills
- Wichita Falls
- Woodsboro
Texas
United States