Identification Keys to Texas Snakes
Venomous Texas Snakes

Fifteen of the 72 species of snakes native to Texas (i.e., 21% of the total species represented)  are dangerously venomous and thus are considered to pose a danger to man. These 15 species are grouped into two families and four genera:

     FAMILY ELAPIDAE (In Texas, only the Coral Snake): 

          Genus Micrurus (New World coral snakes):

               Texas Coral Snake (M. fulvius tener)    

     FAMILY VIPERIDAE (Pit Vipers): 

         Genus Agkistrodon (moccasins):

               Southern copperhead (A. contortrix contortrix)    

               Broad-banded copperhead (A. contortrix laticinctus)    

               Trans-Pecos copperhead (A. contortrix pictigaster)   

               Western cottonmouth (A. piscivorus leucostoma)    

          Genus Crotalus (rattlesnakes): 

               Western diamond-backed rattlesnake (C. atrox)    

               Canebrake rattlesnake (C. horridus atricaudatus)    

               Mottled rock rattlesnake (C. lepidus lepidus)    

               Banded rock rattlesnake (C. lepidus klauberi)    

               Northern black-tailed rattlesnake (C. molossus  molossus)  

               Mojave rattlesnake (C. scutulatus scutulatus)    

               Prairie rattlesnake (C. viridis viridis)    

          Genus Sistrurus (rattlesnakes):

               Desert massasauga (S. catenatus edwardsi)    

               Western massasauga (S. catenatus tergeminus)    

               Western pygmy rattlesnake (S. miliarius streckeri)    

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