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Twin-spotted Rattlesnake vs. Western Diamond-backed Rattlesnake

They meet only where the lower slopes of the sky islands reach the valleys. A: Two rows of small dark spots on grey, joining into one row near the tail in the Twin-spotted Rattlesnake; dusty diamonds edged pale in the Western Diamond-backed Rattlesnake. B: Banded like the body in the Twin-spotted Rattlesnake; bold black and white rings in the Western Diamond-backed Rattlesnake. C: Small: to 26 in (66 cm) in the Twin-spotted Rattlesnake; big: to 7 ft (213 cm) in the Western Diamond-backed Rattlesnake. Both Ridge-nosed and Twin-spotted Rattlesnakes are protected in Arizona. Venomous: leave rattlesnakes alone and give them room.

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Twin-spotted Rattlesnake

Crotalus pricei

Western Diamond-backed Rattlesnake

Crotalus atrox

Photographs via iNaturalist under Creative Commons licences; the photographers are credited on the sheet.

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