Spiders in California

California has about 60 spider species of which the black widow is the most dangerous. Another deadly spider, the brown recluse is rarely found here, with just 20 of them being collected over a span of many decades.

Common spiders: Western Black Widow (Latrodectus hesperus), Brown Widow (Latrodectus geometricus), Long-bodied Cellar (Pholcus phalangioides)

Largest spider: Giant Crab (Olios giganteus)

Spiders in California Identification Chart

Highly Venomous Spiders

Cobweb (Theridiidae)

  • Southern Black Widow (Latrodectus mactans)
  • Western Black Widow (Latrodectus hesperus)
  • Brown Widow (Latrodectus geometricus)

Less Venomous Spiders

Orb-weaver (Araneidae)

Jumping (Salticidae)

Funnel Weaver (Agelenidae)

Wolf (Lycosidae)

  • Beach Wolf (Arctosa littoralis)
  • Alopecosa kochi
  • Schizocosa maxima
  • Schizocosa mccooki

False Wolf  (Zoropsidae)

  • Zoropsis spinimana

Tarantula (Theraphosidae)

Cobweb (Theridiidae)

Desidae

Trapdoor (Ctenizidae)

Amaurobiidae

  • Hacklemesh Weaver (Metaltella simoni)
  • Callobius severus

Corinnidae

Cellar (Pholcidae)

  • Long-bodied Cellar (Pholcus phalangioides)
  • Marbled Cellar (Holocnemus pluchei)

Homalonychidae

  • Homalonychus theologus

Crevice Weaver (Filistatidae)

Crab (Thomisidae)

Linyphiidae

  • Eared Dome Sheet-web (Neriene digna)

Lynx (Oxyopidae)

Euctenizidae

  • Promyrmekiaphila clathrata

Pirate (Mimetidae)

  • Reo eutypus

Ground (Gnaphosidae)

  • Mouse (Scotophaeus blackwalli)
  • Sergiolus montanus

Tube Web (Segestriidae)

  • Segestria pacifica

Running Crab (Philodromidae)

  • Tibellus oblongus

Trachelidae

Cribellate Orb-weaver

  • Uloborus diversus