State herp calendar
Reptiles and Amphibians of Massachusetts
Massachusetts is woods, ponds and a long coastline. Painted Turtles are the most-reported herp. Wood Frogs and Eastern Red-backed Salamanders are common in the woods. September is the busiest month on the calendar here. No venomous snakes made the list.
30 species2 ecoregions
Search entire stateSpecies out across Massachusetts, by group and month
| Group | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snakes | 1 | 5 | 8 | 10 | 10 | 10 | 10 | 10 | 8 | 6 | 1 | |
| Lizards | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||||
| Turtles | 2 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 1 | ||
| Frogs and Toads | 2 | 5 | 8 | 9 | 8 | 8 | 9 | 9 | 8 | 4 | ||
| Salamanders | 1 | 4 | 6 | 6 | 6 | 4 | 3 | 4 | 5 | 6 | 3 | 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.
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Ecoregions of Massachusetts
Seasons shift a lot between Massachusetts's ecoregions. Pick the one nearest you for a 12-month calendar of what's out.
About Massachusetts
When are reptiles and amphibians most active in Massachusetts?
September is the busiest month in Massachusetts, with 23 species at peak activity. At least half of the area's species are active from March through October.
What reptiles and amphibians live in Massachusetts?
30 species have enough iNaturalist records to show here: 10 snakes, 9 frogs and toads, 6 salamanders, 4 turtles, and 1 lizard. The most-reported are the Painted Turtle, Common Garter Snake, and American Toad.
Are there venomous snakes in Massachusetts?
No venomous snakes have enough records in Massachusetts to make this list.
Which reptiles and amphibians in Massachusetts are introduced?
The Pond Slider and Italian Wall Lizard are 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.