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Banded Watersnake vs. Diamondback Watersnake

The owner's pair: their ranges overlap across the Gulf coast (records shared). A: Wide crossbands all the way down in the Banded Watersnake; a dark chain-like net of diamonds, pale between in the Diamondback Watersnake. B: A dark stripe from the eye to the corner of the jaw in the Banded Watersnake; no eye stripe; the side of the head plain, the lips pale in the Diamondback Watersnake. C: Crossbands, often reddish between in the Banded Watersnake; already the chain of dark diamonds on a pale ground in the Diamondback Watersnake.

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Banded Watersnake

Nerodia fasciata

Diamondback Watersnake

Nerodia rhombifer
Banded Watersnake vs. Diamondback Watersnake: comparison sheet with the differences marked

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

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