Defense Against Predators
Northern water snakes have many predators, including birds, raccoons, opossums, foxes, snapping turtles, and other snakes. They defend themselves vigorously when they are threatened. If they are picked up by an animal, or person, they will bite repeatedly, as well as release excrement and musk. Their saliva contains a mild anticoagulant, which can cause the bite to bleed more but poses little risk to humans.
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