the.com/cottonmouth
the only viper that gapes a white mouth to say back off before it bothers biting.
swims boldCruises rivers floating high, unlike harmless water snakes
warning flashOpen mouth shows cottony white lining as threat
also calledWater moccasin, found across the U.S. southeast
heat visionFacial pits sense prey by infrared warmth
venom jobHemotoxic bite destroys tissue and blood cells