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Invasive
Noble False Widow
Steatoda nobilis
18,044 observations
Bold Jumping Spider
Phidippus audax
12,719 observations
Western Black Widow
Latrodectus hesperus
10,394 observations
Brown Widow
Latrodectus geometricus
9,340 observations
Johnson's Jumping Spider
Phidippus johnsoni
8,966 observations
Silver Garden Orbweaver
Argiope argentata
7,623 observations
Koch's Wolf Spider
Alopecosa kochi
6,483 observations
Cross Orbweaver
Araneus diadematus
5,878 observations
False Black Widow
Steatoda grossa
5,852 observations
Western Forest Scorpion
Uroctonus mordax
5,458 observations
Western Spotted Orbweaver
Neoscona oaxacensis
5,357 observations
Long-bodied Cellar Spider
Pholcus phalangioides
5,184 observations
Invasive
Half-edged Wall Jumping Spider
Menemerus semilimbatus
4,873 observations
Woodlouse Spider
Dysdera crocata
4,868 observations
Buttonhook Leafbeetle Jumping Spider
Sassacus vitis
4,813 observations
Colonus hesperus
Colonus hesperus
4,599 observations
Spotted Orbweaver
Neoscona crucifera
4,522 observations
Western Lynx Spider
Oxyopes scalaris
4,088 observations
Pacific Coast Tick
Dermacentor occidentalis
3,979 observations
Marbled Cellar Spider
Holocnemus pluchei
3,903 observations
Banded Garden Spider
Argiope trifasciata
3,833 observations
California Red Jumping Spider
Phidippus adumbratus
3,548 observations
Green Lynx Spider
Peucetia viridans
3,283 observations
Habronattus pyrrithrix
Habronattus pyrrithrix
3,212 observations
Grey House Spider
Badumna longinqua
3,061 observations
Gray Wall Jumping Spider
Menemerus bivittatus
2,957 observations
California Turret Spider
Atypoides riversi
2,762 observations
Desert Tarantula
Aphonopelma iodius
2,582 observations
Yellow Garden Spider
Argiope aurantia
2,579 observations
California common scorpion
Paruroctonus silvestrii
2,440 observations
Western Black-legged Tick
Ixodes pacificus
2,367 observations
Invasive
Mediterranean Spiny False Wolf Spider
Zoropsis spinimana
1,855 observations
Goldenrod Crab Spider
Misumena vatia
1,822 observations
False Tarantula
Calisoga longitarsis
1,669 observations
Ribbon Jumping Spider
Metacyrba taeniola
1,521 observations
Live Oak Erineum Mite
Aceria mackiei
1,513 observations
South American Toothed Hacklemesh Weaver
Metaltella simoni
1,483 observations
Paravaejovis puritanus
Paravaejovis puritanus
1,464 observations
California Swollenstinger Scorpion
Anuroctonus pococki
1,383 observations
Striped Lynx Spider
Oxyopes salticus
1,338 observations
Zebra Jumping Spider
Salticus scenicus
1,316 observations
California Ebony Tarantula
Aphonopelma eutylenum
1,248 observations
Western Parson Spider
Herpyllus propinquus
1,244 observations
Steindachner's Ebony Tarantula
Aphonopelma steindachneri
1,210 observations
American Dog Tick
Dermacentor variabilis
1,078 observations
California Trapdoor Spider
Bothriocyrtum californicum
1,060 observations
Sawfinger Scorpion
Serradigitus gertschi
1,028 observations
Dune Scorpion
Smeringurus mesaensis
1,021 observations
Mule Fat Blister Mite
Aceria baccharices
983 observations
McCook's Split Wolf Spider
Schizocosa mccooki
971 observations
Frequently Asked Questions
- The 10 most common arachnids in California are:
- Noble False Widow (Steatoda nobilis)
- Bold Jumping Spider (Phidippus audax)
- Western Black Widow (Latrodectus hesperus)
- Brown Widow (Latrodectus geometricus)
- Johnson's Jumping Spider (Phidippus johnsoni)
- Silver Garden Orbweaver (Argiope argentata)
- Koch's Wolf Spider (Alopecosa kochi)
- Cross Orbweaver (Araneus diadematus)
- False Black Widow (Steatoda grossa)
- Western Forest Scorpion (Uroctonus mordax)
- The most observed arachnid in California is Noble False Widow (Steatoda nobilis), with 18,044 recorded observations.
- Some of the most commonly observed invasive arachnids in California include:
- Noble False Widow (Steatoda nobilis)
- Half-edged Wall Jumping Spider (Menemerus semilimbatus)
- Mediterranean Spiny False Wolf Spider (Zoropsis spinimana)
- Some of the most commonly observed native arachnids in California include:
- California Turret Spider (Atypoides riversi)
- California Ebony Tarantula (Aphonopelma eutylenum)
- Sawfinger Scorpion (Serradigitus gertschi)