← Herp Calendar map

Snakes

Mississippi Green Watersnake

Nerodia cyclopion

Across the regions where it's common, the Mississippi Green Watersnake peaks from February to April.

Shows up in 1 ecoregion and 2 states

Keep Herp Calendar free

Hi, I'm Nick. I built Herp Calendar on my own and I keep it free, with no ads. If it has helped you find a herp this season, a small tip goes straight into the hosting and the data work. Only if you can spare it. Either way, I'm glad you're here.

Leave a tip

Snakes

Mississippi Green Watersnake

Nerodia cyclopion

Look, don't take. Many states regulate collecting reptiles and amphibians. Photograph it, log it on iNaturalist and leave it where you found it.

Description

The green water snake (Nerodia cyclopion) is a common species of nonvenomous natricine snake endemic to the southeastern United States. A heavy-bodied snake, N. cyclopion is dark green, olive, or brown dorsally.Wikipedia ↗

Habitat

N. cyclopion is distributed from the Florida panhandle westward to Louisiana, and northward through the Mississippi Valley into southern Illinois. It is sometimes found in brackish water.Wikipedia ↗

When it's active

Mating takes place on land in April.Wikipedia ↗
Chris Stahl · CC BY 4.0

Often mistaken for

Northern Cottonmouth, Florida CottonmouthMany scientists dislike the use of the term water moccasin since it can lead to confusion between the venomous cottonmouth and nonvenomous water snakes. Wikipedia ↗Nerodia fasciata is often mistaken for venomous cottonmouths (Agkistrodon piscivorous) despite the differences in their physical appearance. Animal Diversity Web ↗Cottonmouths vs. watersnakes →

When and where it's active

Each row is its own calendar, counted from records in that area. Seasons shift by place.

PeakShoulderQuiet

Ecoregions

JanFebMarAprMayJunJulAugSepOctNovDec
Gulf Coast Prairies and Marshes

States

JanFebMarAprMayJunJulAugSepOctNovDec
LouisianaTexas

About the Mississippi Green Watersnake

When is the Mississippi Green Watersnake most active?

Across the regions where it's common, the Mississippi Green Watersnake peaks from February to April.

Where does the Mississippi Green Watersnake live?

It has enough records to show in 1 ecoregions and 2 states, including Louisiana and Texas.

What does the Mississippi Green Watersnake look like?

It's often confused with the Northern Cottonmouth and Florida Cottonmouth.