State herp calendar
Reptiles and Amphibians of California
California has a little of everything, from wet redwood coast to low desert. Western Fence Lizards are the most-reported herp by a wide margin. The winter rains bring out California Newts and slender salamanders, and May is the busiest month overall. Several rattlesnakes live here, but the Western Rattlesnake is the one most people meet.
112 species12 ecoregions7 venomous
Search entire stateSpecies out across California, by group and month
| Group | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snakes | 9 | 27 | 33 | 37 | 38 | 38 | 37 | 38 | 36 | 32 | 23 | 8 |
| Lizards | 17 | 27 | 33 | 37 | 38 | 38 | 36 | 36 | 35 | 32 | 22 | 13 |
| Turtles | 2 | 2 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 |
| Frogs and Toads | 7 | 9 | 9 | 9 | 11 | 11 | 11 | 11 | 10 | 9 | 7 | 7 |
| Salamanders | 20 | 20 | 19 | 18 | 13 | 10 | 7 | 7 | 10 | 18 | 20 | 20 |
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 California
Seasons shift a lot between California's ecoregions. Pick the one nearest you for a 12-month calendar of what's out.
California Coast Ranges and Foothills
41 speciesOak woodland and chaparral where newts walk to breeding ponds in the winter rains.
View calendar →Central California Valley
19 speciesFarm country and river corridors where fence lizards and chorus frogs hang on.
View calendar →Southern California Mountains
34 speciesChaparral and pine mountains where lizards bask and rattlesnakes hunt.
View calendar →Southern California Coast
52 speciesCoastal sage scrub and cities with fence lizards and a lot of introduced species.
View calendar →Sierra Nevada
30 speciesGranite mountains where fence lizards, newts and garter snakes follow the snowmelt.
View calendar →Klamath Mountains
28 speciesRugged, mixed forest where fence lizards, ensatinas and rattlesnakes overlap.
View calendar →Mojave Desert
39 speciesCreosote desert where chuckwallas, horned lizards and several rattlesnakes live.
View calendar →Sonoran Desert
69 speciesSaguaro desert with the longest lizard list and the most rattlesnakes.
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 →Eastern Cascades and Blue Mountains
18 speciesPine forest and sagebrush where fence lizards and gopher snakes like the heat.
View calendar →Great Basin
28 speciesSagebrush desert where lizards rule and rattlesnakes den in the rocks.
View calendar →Venomous here: Mojave Rattlesnake, Panamint Rattlesnake, Red Diamond Rattlesnake, Sidewinder, Southwestern Speckled Rattlesnake, Western Diamond-backed Rattlesnake, Western Rattlesnake. Don't handle any snake you can't identify.
About California
When are reptiles and amphibians most active in California?
May is the busiest month in California, with 80 species at peak activity. At least half of the area's species are active from January through November.
What reptiles and amphibians live in California?
112 species have enough iNaturalist records to show here: 38 lizards, 38 snakes, 21 salamanders, 11 frogs and toads, and 4 turtles. The most-reported are the Western Fence Lizard, Common Side-blotched Lizard, and Pacific Chorus Frog.
Are there venomous snakes in California?
Yes. The Western Rattlesnake, Red Diamond Rattlesnake, Southwestern Speckled Rattlesnake, Sidewinder, Mojave Rattlesnake, Panamint Rattlesnake, and Western Diamond-backed Rattlesnake live here. Don't handle them.
Which reptiles and amphibians in California are introduced?
The Pond Slider, American Bullfrog, Green Anole, and Mediterranean House Gecko 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.