That's what I always thought too lol but copperheards are very distinct, cotton mouths and water snakes looks VERY similar down here. Some water snakes have the "triangle" shaped head as well as the cotton mouths.
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Yeah I never really had an interest in them either. Most cotton mouths around here are jet black, that's why the color threw me for a loop here. I wish I coulda seen it in person to make a positive I.D.