Ecoregion
Willamette Valley Reptiles and Amphibians by Month
The Willamette Valley is oak savanna, wetlands and farmland. Pacific Chorus Frogs are the most-reported herp. Rough-skinned Newts and Long-toed Salamanders breed in the winter rains. Northwestern Garter Snakes are common. March is the busiest month, and no venomous snakes made the list here.
24 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 Willamette Valley, by group and month
| Group | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snakes | 2 | 5 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 3 | 2 |
| Lizards | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 2 | |||
| Turtles | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |
| Frogs and Toads | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 |
| Salamanders | 7 | 6 | 8 | 8 | 8 | 6 | 2 | 2 | 8 | 9 | 9 | 8 |
Numbers = species active that month (at peak or just starting / winding down).
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21 species at peak or shoulder in September
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shoulderAbout Willamette Valley
When are reptiles and amphibians most active in the Willamette Valley?
March is the busiest month in the Willamette Valley, with 16 species at peak activity. At least half of the area's species are active all year.
What reptiles and amphibians live in the Willamette Valley?
24 species have enough iNaturalist records to show here: 9 salamanders, 7 snakes, 4 lizards, 3 frogs and toads, and 1 turtle. The most-reported are the Pacific Chorus Frog, Northwestern Garter Snake, and Common Garter Snake.
Are there venomous snakes in the Willamette Valley?
No venomous snakes have enough records in the Willamette Valley to make this list.
Which reptiles and amphibians in the Willamette Valley 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.