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Colorado Herpetological Society's

Guide to the Reptiles and Amphibians of Colorado

  
About this Guide
Naming Conflicts,
Documenting,
& References
INDEX OF SPECIES
By Common Name
By Scientific Name
Grouped By Family
Index of Counties
Map of Counties
IDENTIFICATION KEYS
Amphibians
Turtles
Lizards
Snakes
List of Subspecies
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Plains Garter Snake
(Thamnophis radix)

Plains Garter Snake

Family Colubridae

Photo from Hammerson, 1986.
Used with permission.

Last Updated on January 20, 2000.

Plains Garter Snake (Thamnophis radix)   Range Map
Color Key
Description:
Adults to 42" in length. Color greenish gray, light olive, to brownish; prominent yellow to orange stripe on back, pale stripe on sides. Moderately slender body; keeled scales. Single anal plate.
Elevation Range:
Below 7500' in eastern Colorado.
Subspecies in Colorado:
Thamnophis radix haydenii

Plains Garter Snake
(Thamnophis radix)
CountyRef. CountyRef. CountyRef. CountyRef.
AdamsH Dolores  La Plata  Pitkin 
Alamosa  DouglasH Lake  ProwersH
ArapahoeH Eagle  LarimerH PuebloH
Archuleta  El PasoH Las AnimasH Rio Blanco 
BacaH ElbertH LincolnH Rio Grande 
BentH FremontH LoganH Routt 
BoulderH Garfield  Mesa  Saguache 
Chaffee  Gilpin *  Mineral  San Juan 
CheyenneH Grand  Moffat  San Miguel 
Clear CreekH Gunnison  Montezuma  SedgwickH
Conejos  Hinsdale  Montrose  Summit 
Costilla  Huerfano *  MorganH Teller * 
CrowleyH Jackson  OteroH WashingtonH
Custer *  JeffersonH Ouray  WeldH
Delta  KiowaH Park  YumaH
DenverH Kit CarsonH PhillipsH

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