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Mojave Rattlesnake vs. Western Rattlesnake

Both live on the western edge of the Mojave Desert and in the Tehachapi Mountains; their records overlap there. A: Two large scales in the Mojave Rattlesnake; three to six or more small, irregular scales in the Western Rattlesnake. B: Sharp black and white rings, the white rings clearly wider than the black in the Mojave Rattlesnake; dull grey-brown and off-white rings, the dark rings as wide as the pale ones or wider in the Western Rattlesnake. C: Slopes back and passes above the corner of the mouth in the Mojave Rattlesnake; runs down into the corner of the mouth in the Western Rattlesnake. D: Crisp diamonds edged with a continuous ring of pale scales in the Mojave Rattlesnake; blockier, hexagonal or rounded blotches with less distinct pale edges in the Western Rattlesnake. Both are venomous; the Mojave is more dangerous. Leave both alone.

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Mojave Rattlesnake

Crotalus scutulatus

Western Rattlesnake

Crotalus oreganus
Mojave Rattlesnake vs. Western Rattlesnake: comparison sheet with the differences marked

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

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