Statewide
Iowa Reptiles and Amphibians by Month
Every reptile and amphibian with enough records anywhere in Iowa, counted from observations inside the state line. Seasons can differ a lot across the state, so for a closer match, pick your ecoregion on the Iowa page.
19 species
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 Iowa, by group and month
| Group | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snakes | 1 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 3 | ||
| Turtles | 1 | 2 | 3 | 4 | 4 | 3 | 4 | 4 | 2 | |||
| Frogs and Toads | 5 | 6 | 6 | 7 | 7 | 8 | 7 | 6 | 3 | |||
| Salamanders | 1 | 1 | 1 |
Numbers = species active that month (at peak or just starting / winding down).
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18 species at peak or shoulder in September
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shoulderAbout Iowa
When are reptiles and amphibians most active in Iowa?
April is the busiest month in Iowa, with 15 species at peak activity. At least half of the area's species are active from March through October.
What reptiles and amphibians live in Iowa?
19 species have enough iNaturalist records to show here: 8 frogs and toads, 6 snakes, 4 turtles, and 1 salamander. The most-reported are the American Toad, American Bullfrog, and Painted Turtle.
Are there venomous snakes in Iowa?
No venomous snakes have enough records in Iowa to make this list.
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.