Eastern Fence Lizard
Sceloporus undulatus

Family Phrynosomatidae

2¼" to 3½" snout-vent length; to 7¼" overall. Color mottled brown to grayish, frequently with two lighter stripes down back (markings vary regionally). Medium-sized keeled scales on back.
Elevation Range:
Up to 9200'.
Subspecies in Colorado:
Sceloporus undulatus garmani on northeastern and far eastern plains;
Sceloporus undulatus erythrocheilus through central mountains;
Sceloporus undulatus elongatus in western Colorado;
Sceloporus undulatus tristichus in and around Archuleta County in southwestern Colorado.

This species is commonly refered to as the Prairie lizard or Plateau lizard.
  Eastern Fence Lizard
Photo from Hammerson, 1986.
Used with permission.
CountyRef. CountyRef. CountyRef. CountyRef.
DoloresH La PlataH Pitkin * 
AlamosaH DouglasH Lake  ProwersH
Arapahoe #  EagleH LarimerH PuebloH
ArchuletaH El PasoH Las AnimasH Rio BlancoH
BacaH ElbertH LincolnH Rio GrandeH
BentH FremontH LoganH RouttFVanB1
GarfieldH MesaH SaguacheH
ChaffeeH Gilpin *  Mineral *  San Juan * 
CheyenneH Grand  MoffatH San MiguelH
Clear CreekH GunnisonH MontezumaH Sedgwick * 
ConejosH Hinsdale *  MontroseH Summit 
CostillaH HuerfanoH MorganH TellerRPDeF1
Crowley *  Jackson  OteroH WashingtonH
CusterH JeffersonH OurayHMS3 WeldH
DeltaH KiowaH ParkH YumaH
Denver *  Kit CarsonH PhillipsH
Map of Colorado
Color Key
Adams Alamosa Arahapoe Archuleta Baca Bent Boulder Chaffee Cheyenne Clear Creek Conejos Costilla Crowley Custer Delta Denver Dolores Douglas Eagle El Paso Elbert Fremont Garfield Gilpin Grand Gunnison Hinsdale Huerfano Jackson Jefferson Kiowa Kit Carson La Plata Lake Larimer Las Animas Lincoln Logan Mesa Mineral Moffat Montezuma Montrose Morgan Otero Ouray Park Phillips Pitkin Prowers Pueblo Rio Blanco Rio Grande Routt Saguache San Juan San Miguel Sedgewick Summit Teller Washington Weld Yuma