Last updated: July 15, 2020
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Cottonmouth
![051620_moccasin4_doggrell Brown scaled snake with a large, open, white mouth revealing fangs.](/guis/learn/nature/images/051620_moccasin4_doggrell.jpg?maxwidth=650&autorotate=false)
Cottonmouth, NPS/Doggrell
Quick Facts
Scientific Name: Agkistrodon piscivorus
Distribution/Habitat: Swamps, river floodplains, and wetlands in the southeastern United States.
Average Size: 4 feet
Average Lifespan: 15-20 years
Diet: Amphibians, snakes, small reptiles, mammals, birds, and fish.