State herp calendar
Reptiles and Amphibians of Michigan
Michigan is lakeshore, north woods and farmland. American Toads and Green Frogs are the most-reported herps. Painted Turtles bask on almost every lake. May is the busiest month, and no venomous snakes made the list here.
36 species4 ecoregions
Search entire stateSpecies out across Michigan, by group and month
| Group | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snakes | 1 | 7 | 11 | 13 | 13 | 13 | 12 | 12 | 8 | 4 | 1 | |
| Lizards | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||||
| Turtles | 1 | 4 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | |||
| Frogs and Toads | 2 | 8 | 8 | 9 | 8 | 8 | 8 | 8 | 7 | 6 | ||
| Salamanders | 2 | 6 | 6 | 6 | 5 | 5 | 5 | 6 | 5 | 2 |
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 Michigan
Seasons shift a lot between Michigan's ecoregions. Pick the one nearest you for a 12-month calendar of what's out.
Great Lakes Shore
31 speciesLakeshore marshes and dunes with painted turtles, toads and garter snakes.
View calendar →Northern Lakes and Forests
27 speciesNorth woods and lakes where frogs and turtles fit a short, busy summer.
View calendar →Upper Midwest Hardwood Forests
27 speciesHardwood forest and farm ponds with toads, painted turtles and leopard frogs.
View calendar →Corn Belt Midwest
37 speciesFarm country with ponds and parks full of toads, painted turtles and garter snakes.
View calendar →About Michigan
When are reptiles and amphibians most active in Michigan?
May is the busiest month in Michigan, with 30 species at peak activity. At least half of the area's species are active from March through October.
What reptiles and amphibians live in Michigan?
36 species have enough iNaturalist records to show here: 13 snakes, 9 frogs and toads, 7 salamanders, 6 turtles, and 1 lizard. The most-reported are the American Toad, Green Frog, and Painted Turtle.
Are there venomous snakes in Michigan?
No venomous snakes have enough records in Michigan to make this list.
Which reptiles and amphibians in Michigan are introduced?
The Pond Slider is 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.