Eastern Black-tailed Rattlesnake vs. Timber Rattlesnake

Both are big rattlesnakes with a solid black tail; they meet at the eastern edge of the Eastern Black-tailed's range in Texas (records share 2 one-degree squares). A: Broad dark crossbands with pale spots in them in the Eastern Black-tailed Rattlesnake; dark V-shaped (chevron) crossbands in the Timber Rattlesnake. B: A dark snout in the Eastern Black-tailed Rattlesnake; a plain tan head with a dark stripe behind the eye in the Timber Rattlesnake.

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

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