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Invasive
Noble False Widow
Steatoda nobilis
20,040 observations
Bold Jumping Spider
Phidippus audax
14,221 observations
Western Black Widow
Latrodectus hesperus
12,517 observations
Brown Widow
Latrodectus geometricus
11,792 observations
Johnson's Jumping Spider
Phidippus johnsoni
9,515 observations
Silver Garden Orbweaver
Argiope argentata
8,549 observations
Koch's Wolf Spider
Alopecosa kochi
6,619 observations
Cross Orbweaver
Araneus diadematus
6,400 observations
False Black Widow
Steatoda grossa
6,365 observations
Long-bodied Cellar Spider
Pholcus phalangioides
5,798 observations
Western Spotted Orbweaver
Neoscona oaxacensis
5,737 observations
Western Forest Scorpion
Uroctonus mordax
5,674 observations
Invasive
Half-edged Wall Jumping Spider
Menemerus semilimbatus
5,674 observations
Buttonhook Leafbeetle Jumping Spider
Sassacus vitis
5,357 observations
Woodlouse Spider
Dysdera crocata
5,165 observations
Spotted Orbweaver
Neoscona crucifera
5,055 observations
Colonus hesperus
Colonus hesperus
4,973 observations
Marbled Cellar Spider
Holocnemus pluchei
4,561 observations
Banded Garden Spider
Argiope trifasciata
4,303 observations
Western Lynx Spider
Oxyopes scalaris
4,143 observations
Pacific Coast Tick
Dermacentor occidentalis
4,034 observations
Phidippus adumbratus
Phidippus adumbratus
3,831 observations
Green Lynx Spider
Peucetia viridans
3,626 observations
Gray Wall Jumping Spider
Menemerus bivittatus
3,486 observations
Habronattus pyrrithrix
Habronattus pyrrithrix
3,485 observations
Grey House Spider
Badumna longinqua
3,340 observations
Desert Tarantula
Aphonopelma iodius
3,091 observations
California Turret Spider
Atypoides riversi
2,855 observations
Yellow Garden Spider
Argiope aurantia
2,823 observations
California common scorpion
Paruroctonus silvestrii
2,629 observations
Western Black-legged Tick
Ixodes pacificus
2,383 observations
Invasive
Mediterranean Spiny False Wolf Spider
Zoropsis spinimana
2,068 observations
Goldenrod Crab Spider
Misumena vatia
1,939 observations
False Tarantula
Calisoga longitarsis
1,814 observations
Live Oak Erineum Mite
Aceria mackiei
1,722 observations
Paravaejovis puritanus
Paravaejovis puritanus
1,664 observations
South American Toothed Hacklemesh Weaver
Metaltella simoni
1,653 observations
Ribbon Jumping Spider
Metacyrba taeniola
1,648 observations
Western Parson Spider
Herpyllus propinquus
1,624 observations
California Swollenstinger Scorpion
Anuroctonus pococki
1,512 observations
Striped Lynx Spider
Oxyopes salticus
1,496 observations
Steindachner's Ebony Tarantula
Aphonopelma steindachneri
1,409 observations
Zebra Jumping Spider
Salticus scenicus
1,394 observations
California Ebony Tarantula
Aphonopelma eutylenum
1,355 observations
Dune Scorpion
Smeringurus mesaensis
1,219 observations
California Trapdoor Spider
Bothriocyrtum californicum
1,157 observations
Desert Hairy Scorpion
Hadrurus arizonensis
1,101 observations
American Dog Tick
Dermacentor variabilis
1,089 observations
California Black Walnut Pouch Gall Mite
Aceria brachytarsa
1,064 observations
Sawfinger Scorpion
Serradigitus gertschi
1,061 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)
- Long-bodied Cellar Spider (Pholcus phalangioides)
- The most observed arachnid in California is Noble False Widow (Steatoda nobilis), with 20,040 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)