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Florida Cottonmouth vs. Plain-bellied Watersnake

Plain-bellied Watersnakes are heavy, dark snakes of the same swamps and ditches. A: A broad dark stripe hiding the eye; a heat pit and a cat-like pupil in the Florida Cottonmouth; plain, without a dark mask; a round pupil, no pit in the Plain-bellied Watersnake. B: Crossbands full of dark speckles in the Florida Cottonmouth; plain brown or grey above; the belly unmarked orange or yellow in the Plain-bellied Watersnake.

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Florida Cottonmouth

Agkistrodon conanti

Plain-bellied Watersnake

Nerodia erythrogaster
Florida Cottonmouth vs. Plain-bellied 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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