Snakes and spiders in Solano County, California
Solano County, home of Fairfield, has 9 snake and 27 spider species on record, from 260 licensed snake and 7,130 spider records. Venomous species here: the western rattlesnake and the western black widow.
Are there venomous snakes or spiders in Solano County?
Yes. The western rattlesnake: 10 licensed records, 0% of all California records of it. The western black widow: 38 licensed records, 3% of all California records of it.
What snakes are in Solano County?
In all, 9 snake species are on the Solano County list. The most recorded are the western aquatic garter snake (94), the gopher snake (66) and the aquatic garter snake (30).
| # | Species | Records | Share of California records |
|---|---|---|---|
| 1 | Western aquatic garter snake Thamnophis couchii | 94 | 3% |
| 2 | Gopher snake Pituophis catenifer | 66 | 1% |
| 3 | Aquatic garter snake Thamnophis atratus | 30 | 1% |
| 4 | California kingsnake Lampropeltis californiae | 22 | 1% |
| 5 | Eastern racer Coluber constrictor | 20 | 2% |
| 6 | Western rattlesnake venomous Crotalus oreganus | 10 | 0% |
| 7 | Ring-necked snake Diadophis punctatus | 6 | 0% |
| 8 | Striped racer Masticophis lateralis | 4 | 0% |
| 9 | Common garter snake Thamnophis sirtalis | 3 | 0% |
When are snakes out in Solano County?
Observation records of snakes in Solano County run mostly April through October, peaking in May with 38% of them, the same peak as California as a whole.
What spiders are in Solano County?
In all, 27 spider species are on the Solano County list. The most recorded are the bold jumper (2,007), the half-edged wall jumping spider (1,874) and the western lynx spider (612). Solano County holds more than half of all California records of the bold jumper, the half-edged wall jumping spider, the western lynx spider and Habronattus pyrrithrix.
| # | Species | Records | Share of California records |
|---|---|---|---|
| 1 | Bold jumper Phidippus audax | 2,007 | 77% |
| 2 | Half-edged wall jumping spider Menemerus semilimbatus | 1,874 | 86% |
| 3 | Western lynx spider Oxyopes scalaris | 612 | 54% |
| 4 | Steatoda nobilis | 573 | 30% |
| 5 | Habronattus pyrrithrix | 515 | 64% |
| 6 | Striped lynx spider Oxyopes salticus | 411 | 62% |
| 7 | Marbled cellar spider Holocnemus pluchei | 231 | 29% |
| 8 | Zebra spider Salticus scenicus | 124 | 41% |
| 9 | False black widow Steatoda grossa | 109 | 9% |
| 10 | Buttonhook leafbeetle jumping spider Sassacus vitis | 92 | 11% |
| 11 | Koch's wolf spider Alopecosa kochi | 56 | 5% |
| 12 | Dysdera crocata | 52 | 8% |
| 13 | Johnson jumper Phidippus johnsoni | 51 | 6% |
| 14 | Western black widow venomous Latrodectus hesperus | 38 | 3% |
| 15 | Western spotted orbweaver Neoscona oaxacensis | 36 | 6% |
| 16 | Cribellate spider Metaltella simoni | 15 | 4% |
| 17 | Triangulate bud spider Steatoda triangulosa | 15 | 21% |
| 18 | Flatmesh weaver Oecobius navus | 14 | 6% |
| 19 | Kukulcania geophila | 13 | 50% |
| 20 | Attinella dorsata | 10 | 19% |
| 21 | Banded garden spider Argiope trifasciata | 7 | 2% |
| 22 | Hairy tufted jumping spider Phidippus comatus | 5 | 4% |
| 23 | Longbodied cellar spider Pholcus phalangioides | 5 | 1% |
| 24 | Ribbon jumping spider Metacyrba taeniola | 4 | 2% |
| 25 | Colonus hesperus | 3 | 0% |
| 26 | Garden spider Araneus diadematus | 3 | 1% |
| 27 | Giant crab spider Olios giganteus | — | — |
When are spiders out in Solano County?
Observation records of spiders in Solano County run mostly March through November, peaking in May with 14% of them; across California the peak is April.
What stands out in Solano County
Species for which Solano County holds a large share of all California records: the half-edged wall jumping spider, 86% (1,874 of 2,178); the bold jumper, 77% (2,007 of 2,606); Habronattus pyrrithrix, 64% (515 of 800); the striped lynx spider, 62% (411 of 662); the western lynx spider, 54% (612 of 1,123); Kukulcania geophila, 50% (13 of 26); the zebra spider, 41% (124 of 304); Steatoda nobilis, 30% (573 of 1,914).
Common in California, not on the Solano County list
Among the snakes most recorded across California, these do not reach the county list: the western terrestrial garter snake (21,830 statewide), the sidewinder (1,923 statewide), the two-striped garter snake (1,620 statewide), the western shovel-nosed snake (1,482 statewide) and the glossy snake (1,425 statewide). Few records here can mean the species is rare in the county, or that few people have looked.
Among the spiders most recorded across California, these do not reach the county list: the brown widow (776 statewide). Few records here can mean the species is rare in the county, or that few people have looked.
Harmless lookalikes in Solano County
Rattlesnakes are on the county list, and so are harmless species often taken for them: the gopher snake. Widow spiders are on the county list, and so are harmless species often taken for them: the false black widow and the triangulate bud spider. No recluse spiders reach the county list, but the desert recluse is on the California list: treat any spider like it as venomous until identified. Harmless species often taken for them here: the longbodied cellar spider.
Solano County among California counties
By licensed snake records Solano County ranks 44th of 58 California counties with any.
Other California counties with their own page: San Diego County, Lassen County, Shasta County, Riverside County, San Bernardino County, Humboldt County, Sonoma County and San Mateo County.
The whole state: venomous species in California, all snakes, all spiders.
GBIF records read 2026-09-29. Listed: any license. Counted: CC0/CC BY only. How we count.