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Pygmy Rattlesnake vs. Western Diamond-backed Rattlesnake

They meet in central Oklahoma and Texas; the Western Diamond-backed is the common rattler of the west and south. A: Nine big plates in the Pygmy Rattlesnake; many small scales in the Western Diamond-backed Rattlesnake. B: Plain grey with a tiny, thin rattle in the Pygmy Rattlesnake; bold black and white rings of equal width before a big rattle in the Western Diamond-backed Rattlesnake. C: Small, round blotches with a rust stripe between in the Pygmy Rattlesnake; big, dusty diamonds edged pale in the Western Diamond-backed Rattlesnake. Both are venomous: watch from a distance.

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Pygmy Rattlesnake

Sistrurus miliarius

Western Diamond-backed Rattlesnake

Crotalus atrox
Pygmy Rattlesnake vs. Western Diamond-backed 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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