DescriptionCrotaluswillardi (10.3897-zookeys.658.10665) Figure 5.jpg Figure 5; Crotaluswillardi. Sierra del Nido, Chihuahua. Date 28 February 2017 Source
DescriptionMexican ridged nosed rattlesnake head.jpg Head of a Mexican Ridged Nosed Rattlesnake (Crotaluswillardi) with one of two distinctive cranial pits