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Eastern Black-tailed Rattlesnake vs. Mojave Rattlesnake

Both are big rattlesnakes of southern New Mexico (records share 28 one-degree squares). A: Solid black in the Eastern Black-tailed Rattlesnake; pale, with narrow black rings (the white rings wider) in the Mojave Rattlesnake. B: Broad dark crossbands with pale spots in the Eastern Black-tailed Rattlesnake; crisp diamonds of one even colour, edged pale in the Mojave Rattlesnake.

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Eastern Black-tailed Rattlesnake

Crotalus ornatus

Mojave Rattlesnake

Crotalus scutulatus
Eastern Black-tailed Rattlesnake vs. Mojave 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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