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Black Swampsnake vs. Plain-bellied Watersnake

A dark Plain-bellied Watersnake shows a plain orange-red belly too, and lives in the same swamps and ditches. A: Glossy black, smooth scales in the Black Swampsnake; plain brown or grey, dull, keeled scales in the Plain-bellied Watersnake. The Plain-bellied grows over 3 ft with a heavy body; the Black Swampsnake rarely reaches 2 ft.

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Black Swampsnake

Seminatrix pygaea

Plain-bellied Watersnake

Nerodia erythrogaster
Black Swampsnake 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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