Eastern Copperhead vs. Diamondback Watersnake
A brown, patterned snake by water in southwestern Indiana could be either. The Copperhead's bands are hourglasses, pinched narrow over the spine; the Diamondback's dark marks join into a chain or net around pale diamond-shaped patches. Up close the Copperhead has a vertical pupil and a pit between eye and nostril; the Diamondback a round pupil and no pit. Watch either from a distance.
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