Brown Watersnake vs. Eastern Copperhead

Both are brown with dark blotches; copperheads come down to swamp edges in the southeast. A: Square blotches down the middle with alternating squares on the sides in the Brown Watersnake; hourglass bands: narrow over the spine, wide on the sides in the Eastern Copperhead. B: Long, plain brown, round pupil, no pit in the Brown Watersnake; plain copper, with a vertical pupil and a pit between the eye and the nostril in the Eastern Copperhead. The Brown Watersnake lives in and over the water; the Copperhead mostly on land.

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

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