Is one of the most venomous snakes in the United States. It is native mostly to the southeastern and Midwestern portions of the country, and is found in small ponds and other backwater locations. Its bite is extremely painful and emits powerful hemotoxic venom that attacks and kills the red blood cells of the victim, causing extensive tissue damage. It is a common misconception that it is an aggressive animal, this is not true, but it also doesn’t make its bite less dangerous. DESCRIPTION: A thick-bodied aquatic snake. Juveniles have a brown camouflage-type pattern, but adults darken, and older adult Cottonmouth snakes are almost all black, with a white belly. They have a broad head, and usually a stripe behind the eye, and no rattle.