Louisiana
Snakes in Jefferson County
22 species have been documented here, 3 of them venomous.
Venomous snakes in Jefferson County
Full guide & what to do if bitten →
Northern CottonmouthAgkistrodon piscivorusVenomousHeavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Eastern CopperheadAgkistrodon contortrixVenomousHeavy body, triangular head, vertical pupils, and a heat-sensing pit between each eye and nostril.
Pygmy RattlesnakeSistrurus miliariusVenomousStout, dark-blotched body, nine large scales on the crown, and a small rattle.
Every snake recorded in Jefferson County
Banded Watersnake
Nerodia fasciata
Harmless
Western Ribbon Snake
Thamnophis proximus
Harmless
Northern Cottonmouth
Agkistrodon piscivorus
Venomous
North American Racer
Coluber constrictor
Harmless
Rough Greensnake
Opheodrys aestivus
Harmless
Mississippi Green Watersnake
Nerodia cyclopion
Harmless
Western Ratsnake
Pantherophis obsoletus
Harmless
Plain-bellied Watersnake
Nerodia erythrogaster
Harmless
Diamondback Watersnake
Nerodia rhombifer
Harmless
DeKay's Brownsnake
Storeria dekayi
Harmless
Speckled Kingsnake
Lampropeltis holbrooki
Harmless
Mudsnake
Farancia abacura
Harmless
Common Garter Snake
Thamnophis sirtalis
Harmless
Glossy Swampsnake
Liodytes rigida
Harmless
Eastern Kingsnake
Lampropeltis getula
Harmless
Graham's Crawfish Snake
Regina grahamii
Harmless
Eastern Copperhead
Agkistrodon contortrix
Venomous
Eastern Milksnake
Lampropeltis triangulum
Harmless
Eastern Hognose Snake
Heterodon platirhinos
Harmless
Pygmy Rattlesnake
Sistrurus miliarius
Venomous
Western Milksnake
Lampropeltis gentilis
Harmless
Saltmarsh Snake
Nerodia clarkii
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.