But then, mysteriously, they all contracted strange ailments: cottonmouth, headaches, and severe dehydration.
But, Stanley Roth kept a cottonmouth in captivity that ate both toads and tadpoles.
In getting ashore I landed right beside a cottonmouth moccasin snake, said to be as poisonous as a rattlesnake.
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.
Because of the aquatic habits of the cottonmouth, relative humidity probably has little influence on the snake's activity.
All are of late Pleistocene Age and well within the present geographic range of the cottonmouth.
The young are more nearly alike in appearance than adults, the copperhead and the cottonmouth being easily confused.
The named, American kinds of Agkistrodon currently are arranged as three species: the copperhead, the cantil and the cottonmouth.
Some observations on two cottonmouth moccasins made during 12 and 14 years of captivity.