Ecoregion
Great Lakes Shore Reptiles and Amphibians by Month
Marshes, dunes and woodlots line the Great Lakes here. Painted Turtles are the most-reported herp. American Toads and Green Frogs are common, and Common Garter Snakes turn up almost everywhere. Eastern Foxsnakes live along the shore. April is the busiest month.
31 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 Great Lakes Shore, by group and month
| Group | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snakes | 1 | 6 | 10 | 10 | 9 | 10 | 10 | 10 | 9 | 4 | 1 | |
| Lizards | 1 | 1 | 1 | 1 | 1 | 1 | ||||||
| Turtles | 1 | 4 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | |||
| Frogs and Toads | 3 | 7 | 8 | 9 | 9 | 9 | 9 | 9 | 7 | 6 | 1 | |
| Salamanders | 2 | 4 | 4 | 4 | 3 | 1 | 3 | 4 | 3 | 1 | 1 |
Numbers = species active that month (at peak or just starting / winding down).
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30 species at peak or shoulder in September
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shoulderAbout Great Lakes Shore
When are reptiles and amphibians most active in the Great Lakes Shore?
April is the busiest month in the Great Lakes Shore, with 24 species at peak activity. At least half of the area's species are active from March through October.
What reptiles and amphibians live in the Great Lakes Shore?
31 species have enough iNaturalist records to show here: 10 frogs and toads, 10 snakes, 6 turtles, 4 salamanders, and 1 lizard. The most-reported are the Painted Turtle, American Toad, and Common Garter Snake.
Are there venomous snakes in the Great Lakes Shore?
No venomous snakes have enough records in the Great Lakes Shore to make this list.
Which reptiles and amphibians in the Great Lakes Shore 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.