Ecoregion
Mississippi Alluvial Plain Reptiles and Amphibians by Month
Bottomland forest, bayous and farmland fill the Mississippi Alluvial Plain. American Alligators are the most-reported herp. Banded Watersnakes and Western Ribbon Snakes are common along the water, and so is the Northern Cottonmouth. Green Treefrogs call on summer nights. April is the busiest month.
46 species3 venomous
Peak and shoulder ratings are rough guidance, not a schedule. Weather, elevation and the year can shift any species by weeks.
Rare and protected species are left off on purpose. Look, don't take, and never handle a venomous snake.
Species out in Mississippi Alluvial Plain, by group and month
| Group | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snakes | 5 | 10 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 10 | 8 | 3 |
| Lizards | 4 | 6 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 4 |
| Turtles | 2 | 6 | 9 | 9 | 9 | 9 | 9 | 8 | 7 | 4 | 2 | 2 |
| Frogs and Toads | 5 | 7 | 10 | 9 | 10 | 10 | 9 | 9 | 9 | 9 | 4 | 3 |
| Salamanders | 1 | 1 | 4 | 4 | 2 | 1 | 1 | 1 | 1 |
Numbers = species active that month (at peak or just starting / winding down).
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36 species at peak or shoulder in September
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shoulderAbout Mississippi Alluvial Plain
When are reptiles and amphibians most active in the Mississippi Alluvial Plain?
April is the busiest month in the Mississippi Alluvial Plain, with 42 species at peak activity. At least half of the area's species are active from February through October.
What reptiles and amphibians live in the Mississippi Alluvial Plain?
46 species have enough iNaturalist records to show here: 14 snakes, 11 frogs and toads, 9 turtles, 7 lizards, 4 salamanders, and 1 alligator. The most-reported are the American Alligator, Green Anole, and Brown Anole.
Are there venomous snakes in the Mississippi Alluvial Plain?
Yes. The Northern Cottonmouth, Timber Rattlesnake, and Eastern Copperhead live here. Don't handle them.
Which reptiles and amphibians in the Mississippi Alluvial Plain are introduced?
The Brown Anole, Spotted House Gecko, Mediterranean House Gecko, and Greenhouse Frog are not native here.
Where does this data come from?
Activity calendars are built from iNaturalist research-grade observations (downloaded through GBIF, September 2026), corrected for how many people are out observing each month. Rare and protected species are left off on purpose.