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Great Plains Ratsnake vs. Prairie Kingsnake

Both are tan or grey snakes with brown blotches of the southwest Illinois bluffs. The Great Plains Ratsnake has a pair of dark stripes on the neck that join into a spearpoint between the eyes, larger blotches, weakly keeled scales, and a white belly boldly checkered with black; the Prairie Kingsnake has smooth, glossy scales, many small reddish-brown blotches edged in black, a dark line from the eye back along the head but no spearpoint, and a plain or lightly marked yellowish belly.

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Great Plains Ratsnake

Pantherophis emoryi

Prairie Kingsnake

Lampropeltis calligaster
Great Plains Ratsnake vs. Prairie Kingsnake: comparison sheet with the differences marked

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

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