Spiders in Oregon

Oregon houses more than 500 spider species with about 20 to 30 of them being unique belonging to prominent families. Most of them are small, dwelling in rotten logs, forest litter, and rock crevices. Most are harmless barring the widow and yellow sac being potentially dangerous to humans.

Common spiders: Mouse (Scotophaeus blackwalli), Goldenrod Crab (Misumena vatia), Hobo (Eratigena agrestis)

Largest spiders: Hobo (Eratigena agrestis), Giant House (Eratigena atrica)

Highly Venomous Spiders

Cobweb (Theridiidae)

• Southern Black Widow (Latrodectus mactans)
• Northern Black Widow (Latrodectus variolus)
• Western Black Widow (Latrodectus hesperus)

Cheiracanthiidae

• Black-footed Yellow Sac (Cheiracanthium inclusum)

Less Venomous Spiders

Orb-weaver (Araneidae)

• Cross Orb-weaver (Araneus diadematus)
• Missing Sector Orb-weaver (Zygiella x-notata)
• Giant House (Eratigena atrica)

Cobweb (Theridiidae)

• Triangulate Cobweb (Steatoda triangulosa)
• Common House (Parasteatoda tepidariorum)

Nursery Web (Pisauridae)

• Dark Fishing (Dolomedes tenebrosus)
• Pisaurina dubia

Wolf (Lycosidae)

• Tiger Wolf (Tigrosa aspersa)
• Rabid Wolf (Rabidosa rabida)
• Tigrosa helluo
• Tigrosa georgicola
• Trochosa sepulchralis
• Trochosa terricola

Jumping (Salticidae)

• Bold Jumper (Phidippus audax)
• Zebra Back (Salticus scenicus)

Crab (Thomisidae)

• Goldenrod Crab (Misumena vatia)

Huntsman ( Sparassidae )

• Giant Crab (Olios giganteus)

Cellar (Pholcidae)

• Long-bodied Cellar (Pholcus phalangioides)

Funnel Weaver (Agelenidae)

• Barn Funnel Weaver (Tegenaria domestica)
• Hobo (Eratigena agrestis)

Ground (Gnaphosidae)

• Mouse (Scotophaeus blackwalli)
• Sergiolus montanus