State herp calendar
Reptiles and Amphibians of Connecticut
Connecticut is mostly woods, ponds and suburbs. Green Frogs and American Toads are the most-reported herps. Wood Frogs and Spotted Salamanders head to vernal pools on warm spring rains. April is the busiest month. The Eastern Copperhead lives here.
27 species2 ecoregions1 venomous
Search entire stateSpecies out across Connecticut, by group and month
| Group | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snakes | 1 | 3 | 7 | 8 | 8 | 8 | 8 | 8 | 6 | 3 | 1 | |
| Turtles | 1 | 3 | 4 | 4 | 4 | 4 | 4 | 3 | 2 | 1 | ||
| Frogs and Toads | 2 | 6 | 7 | 8 | 8 | 8 | 8 | 8 | 7 | 3 | ||
| Salamanders | 2 | 6 | 7 | 7 | 5 | 5 | 5 | 7 | 7 | 5 | 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.
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Ecoregions of Connecticut
Seasons shift a lot between Connecticut's ecoregions. Pick the one nearest you for a 12-month calendar of what's out.
New England Coast and Pine Barrens
33 speciesCoastal woods, pine barrens and ponds with painted turtles and spring frogs.
View calendar →New England Highlands
25 speciesNorthern hardwood hills where newts, wood frogs and salamanders wake with the thaw.
View calendar →Venomous here: Eastern Copperhead. Don't handle any snake you can't identify.
About Connecticut
When are reptiles and amphibians most active in Connecticut?
April is the busiest month in Connecticut, with 22 species at peak activity. At least half of the area's species are active from March through October.
What reptiles and amphibians live in Connecticut?
27 species have enough iNaturalist records to show here: 8 frogs and toads, 8 snakes, 7 salamanders, and 4 turtles. The most-reported are the Green Frog, American Toad, and Painted Turtle.
Are there venomous snakes in Connecticut?
Yes. The Eastern Copperhead lives here. Don't handle them.
Which reptiles and amphibians in Connecticut 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.