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Invasive
Noble False Widow
Steatoda nobilis
17,389 observations
Bold Jumping Spider
Phidippus audax
11,892 observations
Western Black Widow
Latrodectus hesperus
9,758 observations
Brown Widow
Latrodectus geometricus
8,901 observations
Johnson's Jumping Spider
Phidippus johnsoni
8,562 observations
Silver Garden Orbweaver
Argiope argentata
7,296 observations
Cross Orbweaver
Araneus diadematus
5,849 observations
False Black Widow
Steatoda grossa
5,681 observations
Western Spotted Orbweaver
Neoscona oaxacensis
5,324 observations
Long-bodied Cellar Spider
Pholcus phalangioides
5,041 observations
Western Forest Scorpion
Uroctonus mordax
4,857 observations
Woodlouse Spider
Dysdera crocata
4,618 observations
Buttonhook Leafbeetle Jumping Spider
Sassacus vitis
4,542 observations
Spotted Orbweaver
Neoscona crucifera
4,506 observations
Invasive
Half-edged Wall Jumping Spider
Menemerus semilimbatus
4,443 observations
Colonus hesperus
Colonus hesperus
4,344 observations
Koch's Wolf Spider
Alopecosa kochi
4,224 observations
Pacific Coast Tick
Dermacentor occidentalis
3,854 observations
Marbled Cellar Spider
Holocnemus pluchei
3,823 observations
Banded Garden Spider
Argiope trifasciata
3,800 observations
California Red Jumping Spider
Phidippus adumbratus
3,496 observations
Green Lynx Spider
Peucetia viridans
3,207 observations
Habronattus pyrrithrix
Habronattus pyrrithrix
3,139 observations
Grey House Spider
Badumna longinqua
2,956 observations
Gray Wall Jumping Spider
Menemerus bivittatus
2,821 observations
California Turret Spider
Atypoides riversi
2,711 observations
Yellow Garden Spider
Argiope aurantia
2,572 observations
Desert Tarantula
Aphonopelma iodius
2,540 observations
California common scorpion
Paruroctonus silvestrii
2,355 observations
Western Black-legged Tick
Ixodes pacificus
2,313 observations
Western Lynx Spider
Oxyopes scalaris
1,877 observations
Invasive
Mediterranean Spiny False Wolf Spider
Zoropsis spinimana
1,814 observations
Goldenrod Crab Spider
Misumena vatia
1,697 observations
False Tarantula
Calisoga longitarsis
1,620 observations
Live Oak Erineum Mite
Aceria mackiei
1,454 observations
Ribbon Jumping Spider
Metacyrba taeniola
1,452 observations
Paravaejovis puritanus
Paravaejovis puritanus
1,389 observations
South American Toothed Hacklemesh Weaver
Metaltella simoni
1,369 observations
California Swollenstinger Scorpion
Anuroctonus pococki
1,338 observations
California Ebony Tarantula
Aphonopelma eutylenum
1,243 observations
Zebra Jumping Spider
Salticus scenicus
1,219 observations
Western Parson Spider
Herpyllus propinquus
1,201 observations
Steindachner's Ebony Tarantula
Aphonopelma steindachneri
1,198 observations
American Dog Tick
Dermacentor variabilis
1,062 observations
California Trapdoor Spider
Bothriocyrtum californicum
1,024 observations
Dune Scorpion
Smeringurus mesaensis
988 observations
Desert Hairy Scorpion
Hadrurus arizonensis
925 observations
Mule Fat Blister Mite
Aceria baccharices
920 observations
Six-spotted Orbweaver
Araniella displicata
914 observations
Sawfinger Scorpion
Serradigitus gertschi
889 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)
- Cross Orbweaver (Araneus diadematus)
- False Black Widow (Steatoda grossa)
- Western Spotted Orbweaver (Neoscona oaxacensis)
- Long-bodied Cellar Spider (Pholcus phalangioides)
- The most observed arachnid in California is Noble False Widow (Steatoda nobilis), with 17,389 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)