Alligators inhabit the southern river-bottoms, and there are some rattlesnakes on the uplands.
In the eastern portion of the Coastal Plain Region are the cotton rat, rice-field rat, marsh rabbit, big-eared bat, brown pelican, swallow-tailed kite, black vulture and some rattlesnakes and cotton-mouth moccasin snakes, all of which are common farther south; and there are some turtles and terrapins, and many geese, swans, ducks, and other water-fowl.
So far as is known, however, only the large spiders belonging to this group possess this special means of defence, and in many other species this is accompanied by highly-developed stridulating organs resembling those of rattlesnakes and scorpions in function.
Every bayou contains alligators; and reptiles of various species, such as turtles, lizards, horned toads, rattlesnakes and moccasins are abundant.
Copperhead snakes and rattlesnakes are occasionally seen, and there are several species of harmless serpents.