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Great Plains Ground Snake vs. Flat-headed Snake

Both are small, plain, secretive snakes found under rocks; the Missouri Department of Conservation notes they are often found together (records share 39 one-degree squares, Kansas to Texas). A: Each scale edged darker, or oval black saddles in the Great Plains Ground Snake; plain, with no marks at all in the Flat-headed Snake. B: The colour of the body (or crossed by a black band in banded animals), rounded in the Great Plains Ground Snake; flat, and a little darker brown than the body in the Flat-headed Snake. The Flat-headed Snake's belly is salmon pink (the Great Plains Ground Snake's is whitish), and it has no loreal scale between the eye and the nostril scales; the ground snake has one.

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Great Plains Ground Snake

Sonora episcopa

Flat-headed Snake

Tantilla gracilis

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

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