Classification
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Crotalus - Rattlesnakes
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Crotalus willardi - Ridge-nosed Rattlesnake
- C. w. amabilis - Del Nido Ridge-nosed Rattlesnake
- C. w. meridionalis - Southern Ridge-nosed Rattlesnake
- C. w. obscurus - New Mexico Ridge-nosed Rattlesnake
- C. w. silus - Chihuahuan Ridge-nosed Rattlesnake
- C. w. willardi - Arizona Ridge-nosed Rattlesnake
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Crotalus willardi - Ridge-nosed Rattlesnake
