ridge-nosed rattlesnake, Willard's rattlesnake, Willard's rattler Crotalus willardi is a venomous pit viper species found in the southwestern United States...

New Mexico ridge-nosed rattlesnake. Animas ridge-nosed rattlesnake, Crotalus willardi obscurus is a venomous pitviper subspecies found in northwestern Mexico...

has lost its rattle entirely, Crotalus lorenzoensis usually has no rattle, and both Crotalus ruber lucasensis and Crotalus estebanensis exhibit a tendency...

rattlesnake Crotalus viridis, Prairie rattlesnake Crotalus viridis nuntius, Hopi rattlesnake Crotalus viridis viridis, Prairie rattlesnake Crotalus willardi, Ridge-nosed...

Arizona state reptile is the Arizona ridge-nosed rattlesnake (Crotalus willardi willardi). Common snapping turtle (Chelydra serpentina) - introduced Painted...

Arizona State Reptile is the Arizona ridge-nosed rattlesnake (Crotalus willardi willardi). Arizona Milk Snake Arizona mountain kingsnake Arizona Patch-nosed...

Nevada). Under Crotalus (one of two rattlesnake genera), Arizona named Crotalus willardi willardi, while West Virginia chose Crotalus horridus. With Phrynosoma...

only in Arizona; several sub-species of the ridge-nosed rattlesnake (Crotalus willardi), the most recent rattlesnake species to be discovered in the United...

crocodile) Crotalus catalinensis (Catalina rattlesnake) Crotalus pusillus (Tancitarian dusky rattlesnake) Crotalus unicolor (Aruba rattlesnake) Crotalus willardi...

only in Arizona; several sub-species of the ridge-nosed rattlesnake (Crotalus willardi), and the desert massasauga (Sistrurus catenatus edwardsii). Other...