Science
Eastern Diamondback Rattlesnake Reigns as Louisiana’s Largest Snake
The Eastern diamondback rattlesnake is the largest snake found in Louisiana, reaching lengths of three to six feet and occasionally longer. It is also the largest venomous snake in North America, with the biggest recorded specimen measuring 99 inches (8.25 feet), according to The Rattlesnake Conservancy. The species is distinguished by its diamond pattern on the back and a prominent rattle on the tail. Its camouflage allows it to blend into grasses and vine cover, where it ambushes prey. The Eastern diamondback rattlesnake is considered the most dangerous venomous snake in the United States because of its potent venom, large size, and ability to deliver a massive dose. A bite can have a fatality rate of 20‑30% without treatment and can cause severe tissue damage, blood cell destruction, and potentially fatal complications, according to the National Zoo.
Other large snakes in Louisiana include the non‑venomous Eastern Coachwhip, which can grow four to six feet long; the non‑venomous Louisiana Pine Snake, which can reach four to five feet; and the venomous Timber Rattlesnake, which can grow two to six feet long.
The Eastern indigo snake, the longest snake native to North America, can reach almost nine feet, but it is no longer present in Louisiana, the U.S. Fish and Wildlife Service reports. This leaves the Eastern diamondback rattlesnake, Eastern coachwhip, and Louisiana pine snake as the largest species currently found in the state.