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Invasive
Noble False Widow
Steatoda nobilis
17,928 observations
Bold Jumping Spider
Phidippus audax
12,595 observations
Western Black Widow
Latrodectus hesperus
10,276 observations
Brown Widow
Latrodectus geometricus
9,289 observations
Johnson's Jumping Spider
Phidippus johnsoni
8,926 observations
Silver Garden Orbweaver
Argiope argentata
7,595 observations
Koch's Wolf Spider
Alopecosa kochi
6,474 observations
Cross Orbweaver
Araneus diadematus
5,872 observations
False Black Widow
Steatoda grossa
5,818 observations
Western Forest Scorpion
Uroctonus mordax
5,432 observations
Western Spotted Orbweaver
Neoscona oaxacensis
5,355 observations
Long-bodied Cellar Spider
Pholcus phalangioides
5,180 observations
Invasive
Half-edged Wall Jumping Spider
Menemerus semilimbatus
4,814 observations
Buttonhook Leafbeetle Jumping Spider
Sassacus vitis
4,761 observations
Woodlouse Spider
Dysdera crocata
4,744 observations
Colonus hesperus
Colonus hesperus
4,559 observations
Spotted Orbweaver
Neoscona crucifera
4,522 observations
Western Lynx Spider
Oxyopes scalaris
4,082 observations
Pacific Coast Tick
Dermacentor occidentalis
3,966 observations
Marbled Cellar Spider
Holocnemus pluchei
3,897 observations
Banded Garden Spider
Argiope trifasciata
3,827 observations
California Red Jumping Spider
Phidippus adumbratus
3,539 observations
Green Lynx Spider
Peucetia viridans
3,256 observations
Habronattus pyrrithrix
Habronattus pyrrithrix
3,187 observations
Grey House Spider
Badumna longinqua
3,055 observations
Gray Wall Jumping Spider
Menemerus bivittatus
2,932 observations
California Turret Spider
Atypoides riversi
2,758 observations
Yellow Garden Spider
Argiope aurantia
2,578 observations
Desert Tarantula
Aphonopelma iodius
2,573 observations
California common scorpion
Paruroctonus silvestrii
2,430 observations
Western Black-legged Tick
Ixodes pacificus
2,363 observations
Invasive
Mediterranean Spiny False Wolf Spider
Zoropsis spinimana
1,854 observations
Goldenrod Crab Spider
Misumena vatia
1,815 observations
False Tarantula
Calisoga longitarsis
1,661 observations
Ribbon Jumping Spider
Metacyrba taeniola
1,508 observations
Live Oak Erineum Mite
Aceria mackiei
1,496 observations
South American Toothed Hacklemesh Weaver
Metaltella simoni
1,466 observations
Paravaejovis puritanus
Paravaejovis puritanus
1,453 observations
California Swollenstinger Scorpion
Anuroctonus pococki
1,372 observations
Striped Lynx Spider
Oxyopes salticus
1,334 observations
Zebra Jumping Spider
Salticus scenicus
1,298 observations
California Ebony Tarantula
Aphonopelma eutylenum
1,251 observations
Western Parson Spider
Herpyllus propinquus
1,226 observations
Steindachner's Ebony Tarantula
Aphonopelma steindachneri
1,209 observations
American Dog Tick
Dermacentor variabilis
1,077 observations
California Trapdoor Spider
Bothriocyrtum californicum
1,058 observations
Dune Scorpion
Smeringurus mesaensis
1,016 observations
Mule Fat Blister Mite
Aceria baccharices
964 observations
McCook's Split Wolf Spider
Schizocosa mccooki
963 observations
Desert Hairy Scorpion
Hadrurus arizonensis
956 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 17,928 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)