In getting ashore I landed right beside a cottonmouth moccasin snake, said to be as poisonous as a rattlesnake.
When he threw it down a cottonmouth moccasin crawled out of a hole in it.
The named, American kinds of Agkistrodon currently are arranged as three species: the copperhead, the cantil and the cottonmouth.
All are of late Pleistocene Age and well within the present geographic range of the cottonmouth.
Food is obtained by a variety of methods depending on the type of food, age of the cottonmouth, and possibly other factors.
The young are more nearly alike in appearance than adults, the copperhead and the cottonmouth being easily confused.
The cottonmouth occurs throughout the coastal plains of the southeastern United States, usually at altitudes of 500 feet or less.
The name "cottonmouth" also was derived from this behavior, although the lining of the mouth is whitish in most other snakes.
There is little paleontological evidence illustrating evolution of the cottonmouth or for that matter of crotalids in general.
The scutellation of the cottonmouth closely resembles that of the other species of Agkistrodon.