A Great Basin Rattlesnake from northern Arizona, showing off its sharply patterned face. These are a wide-spread rattlesnake species, found throughout the Great Basin Desert in the western US, and some transitional habitat with influence from Mohave and Sonoran deserts, and high-elevation pine forest. Personally, I think the rosy-cheeked variety often seen in the Arizona Strip are uniquely beautiful. This one was photographed and left alone to continue doing its rattlesnakey things.