Glossy Swampsnake vs. Queensnake

Both are slim, olive-brown crayfish eaters; they meet in Louisiana, Mississippi and Arkansas (records share 11 one-degree squares). A: Two neat rows of black half-moons down the middle in the Glossy Swampsnake; four dark stripes running along it in the Queensnake. B: No clean pale stripe in the Glossy Swampsnake; a narrow yellow stripe low on each side in the Queensnake. The Queensnake lives along rocky streams, the Glossy Swampsnake in swamps and muddy ditches.

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

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