Venom variability and envenoming severity outcomes of the Crotalus scutulatus scutulatus (Mojave rattlesnake) from Southern Arizona

► Six venom phenotypes were identified in C. s. scutulatus. ► Venom changed geographically from south central to southeastern Arizona. ► SVMP-rich phenotypes have the highest LD50. ► Mojave toxin-rich exhibit the lowest LD50.