State herp calendar
Reptiles and Amphibians of South Dakota
South Dakota is prairie in the east and the Black Hills in the west. Painted Turtles and Northern Leopard Frogs are the most-reported herps. Plains Garter Snakes are the common snake. May is the busiest month, and the Prairie Rattlesnake lives here.
18 species2 ecoregions1 venomous
Search entire stateSpecies out across South Dakota, by group and month
| Group | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snakes | 1 | 4 | 8 | 8 | 7 | 7 | 7 | 4 | ||||
| Lizards | 1 | 1 | 1 | 1 | ||||||||
| Turtles | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | ||||
| Frogs and Toads | 1 | 3 | 6 | 6 | 6 | 6 | 5 | 3 | ||||
| Salamanders | 1 | 1 | 1 | 1 | 1 |
Numbers = species active that month (at peak or just starting / winding down).
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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.
Pick your ecoregion
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Tap a region to see what's out
Ecoregions of South Dakota
Seasons shift a lot between South Dakota's ecoregions. Pick the one nearest you for a 12-month calendar of what's out.
Northern Great Plains
15 speciesOpen prairie and pothole ponds with leopard frogs, painted turtles and rattlesnakes.
View calendar →Middle Rockies and Wyoming Basin
10 speciesHigh, cold country with a short season and just a handful of herps.
View calendar →Venomous here: Prairie Rattlesnake. Don't handle any snake you can't identify.
About South Dakota
When are reptiles and amphibians most active in South Dakota?
May is the busiest month in South Dakota, with 14 species at peak activity. At least half of the area's species are active from April through October.
What reptiles and amphibians live in South Dakota?
18 species have enough iNaturalist records to show here: 8 snakes, 6 frogs and toads, 2 turtles, 1 salamander, and 1 lizard. The most-reported are the Painted Turtle, Northern Leopard Frog, and Plains Garter Snake.
Are there venomous snakes in South Dakota?
Yes. The Prairie Rattlesnake lives here. Don't handle them.
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.