The cottonmouth snake, known for its distinctive white mouth and potent venom, is a significant venomous species in North America, primarily found in the southeastern United States. These semi ...
Cottonmouth viper (Agkistrodon piscivorus) – 7 mph (11 kph) Commonly known as the water moccasin, the cottonmouth viper is native to the Southeastern United States, typically in or near water.