Snakes found in Louisiana include the cottonmouth, copperhead, diamond-backed water snake, common garter snake, common water snake and eastern ribbon snake. There's also the eastern worm snake, milk snake, Louisiana pine snake, harlequin coral snake, pygmy rattlesnake, rainbow snake, Texas coral snake and scarlet king snake. Other common snakes in the state include the canebrake rattlesnake and scarlet snake.
Most of Louisiana's snakes are harmless to humans and beneficial in that they eat rats and other vermin. In fact, its diet is how the western rat snake got its name. A few snakes are venomous, including the copperhead, cottonmouth, various types of rattlesnakes and coral snakes. Water snakes aren't aquatic snakes, but they live near the water, are excellent swimmers, and eat frogs and fish.
Sometimes, people mistake the coral snake for the scarlet snake, the milk snake or the scarlet king snake. They all have red, yellow, or white and black rings, but the black rings of the coral snake are bordered by yellow rings. The scarlet snake, milk snake and the scarlet king snake have yellow or white rings bordered by black. In the case of the scarlet snake, the yellow or white bands can be speckled with black.