Twin-spotted Rattlesnake vs. Arizona Black Rattlesnake
Both live in the Pinaleño Mountains. A: Two rows of small dark spots on grey, joining into one row near the tail in the Twin-spotted Rattlesnake; black blotches edged by thin pale lines in the Arizona Black Rattlesnake. B: Blue-grey to pale grey-brown in the Twin-spotted Rattlesnake; dark grey-brown to black in the Arizona Black Rattlesnake. C: Small: to 26 in (66 cm) in the Twin-spotted Rattlesnake; bigger: to 42 in (107 cm) in the Arizona Black Rattlesnake. Both Ridge-nosed and Twin-spotted Rattlesnakes are protected in Arizona. Venomous: leave rattlesnakes alone and give them room.
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