Crotalus willardi, ridge-nosed rattlesnake

Crotalus willardi willardi
Crotalus willardi silus

Locations

Sierra El Tigre, Sonora
Mexico
30° 35' 51.828" N, 109° 10' 50.7216" W
MX
Sierra La Madera, Sonora
Mexico
30° 38' 19.1436" N, 110° 45' 26.874" W
MX
Sierra Bacadéhuachi, Sonora
Mexico
29° 50' 29.3172" N, 108° 59' 0.0816" W
MX

The ridge-nosed rattlesnake is a small montane rattlesnake, which has 3 subspecies in our region. Obscurus has a very small range living in the Sierra San Luis, Animas and Peloncillo Mountains. Silus lives in the southern Sky Islands and parts of the Sierra Madre. Willardi occurs in the Sky Islands of northern Sonora and southern Arizona.

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