Graham's Crawfish Snake vs. Common Watersnake

Both are brown snakes of pond and marsh edges across Illinois. Graham's Crawfish Snake is plain brown or olive with a broad yellowish stripe along the lower side, three scale rows wide and edged below by a thin dark line, and a plain cream or yellow belly; the Common Watersnake is banded near the head and blotched down the body at every age, with red or black half-moons on the belly.

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

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