State herp calendar
Reptiles and Amphibians of Oregon
Oregon has wet coast and valleys in the west and dry high desert in the east. Pacific Chorus Frogs are the most-reported herp. Rough-skinned Newts and Ensatinas live in the wet forests. April is the busiest month, and the Western Rattlesnake lives here.
43 species8 ecoregions1 venomous
Search entire stateSpecies out across Oregon, by group and month
| Group | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snakes | 3 | 5 | 8 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 4 | 2 |
| Lizards | 2 | 5 | 5 | 11 | 11 | 11 | 11 | 10 | 9 | 6 | 3 | 1 |
| Turtles | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |
| Frogs and Toads | 4 | 3 | 4 | 4 | 7 | 8 | 8 | 8 | 8 | 7 | 4 | 4 |
| Salamanders | 11 | 13 | 13 | 13 | 13 | 8 | 3 | 5 | 10 | 11 | 13 | 12 |
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 Oregon
Seasons shift a lot between Oregon's ecoregions. Pick the one nearest you for a 12-month calendar of what's out.
Willamette Valley
24 speciesOak savanna and wetlands where chorus frogs call through the wet winter.
View calendar →Eastern Cascades and Blue Mountains
18 speciesPine forest and sagebrush where fence lizards and gopher snakes like the heat.
View calendar →Klamath Mountains
28 speciesRugged, mixed forest where fence lizards, ensatinas and rattlesnakes overlap.
View calendar →Pacific Northwest Coast
42 speciesRainforest coast where salamanders and chorus frogs are active through the wet winter.
View calendar →Cascades
29 speciesCool mountain forests and lakes, best for frogs, newts and garter snakes.
View calendar →Columbia Plateau
15 speciesDry sagebrush and wheat country where gopher snakes and rattlesnakes are the main finds.
View calendar →Great Basin
28 speciesSagebrush desert where lizards rule and rattlesnakes den in the rocks.
View calendar →Snake River Plain
17 speciesLava plains and sagebrush with gopher snakes, fence lizards and rattlesnakes.
View calendar →Venomous here: Western Rattlesnake. Don't handle any snake you can't identify.
About Oregon
When are reptiles and amphibians most active in Oregon?
April is the busiest month in Oregon, with 24 species at peak activity. At least half of the area's species are active from January through November.
What reptiles and amphibians live in Oregon?
43 species have enough iNaturalist records to show here: 13 salamanders, 11 lizards, 10 snakes, 8 frogs and toads, and 1 turtle. The most-reported are the Pacific Chorus Frog, Western Fence Lizard, and Rough-skinned Newt.
Are there venomous snakes in Oregon?
Yes. The Western Rattlesnake lives here. Don't handle them.
Which reptiles and amphibians in Oregon are introduced?
The American Bullfrog and Pond Slider 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.