Spiders in Colorado

Colorado has a lot many spider species of which most of them do not live for more than a year. However, the widow, tarantula and wolf species can survive a little longer. The brown recluse and the black widow are the deadliest spiders of the state. The tarantula and the yellow-sac, known for their mildly venomous effect on humans also thrive here.

Common spiders: Banded Garden (Argiope trifasciata), Carolina Wolf (Hogna carolinensis), Triangulate Cobweb (Steatoda triangulosa)

Largest spiders: Carolina Wolf (Hogna carolinensis), Banded Garden (Argiope trifasciata)

Highly Venomous Spiders

Cobweb (Theridiidae)

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

Sicariidae

• Brown Recluse (Loxosceles reclusa)

Cheiracanthiidae

• Northern Yellow Sac (Cheiracanthium mildei)

Less Venomous Spiders

Tarantula

• Texas Brown Tarantula (Aphonopelma hentzi)

Cobweb (Theridiidae)

• Steatoda grandis

Orb-Weavers (Araneidae)

• Hentz Orb-weaver (Neoscona crucifera)
• Bridge Orb-weaver (Larinioides sclopetarius)
• Banded Garden (Argiope trifasciata)
• Cat-faced (Araneus gemmoides)

Nursery Web (Pisauridae)

• Striped Fishing (Dolomedes scriptus)

Jumping (Salticidae)

• Bold Jumper (Phidippus audax)
• Zebra Back (Salticus scenicus)
• Apache Jumping (Phidippus apacheanus)
• Euophrys monadnock
• Platycryptus californicus

Running Crab (Philodromidae)

• Ebo evansae

Wolf (Lycosidae)

• Carolina Wolf (Hogna carolinensis)
• Geolycosa missouriensis
• Hogna frondicola
• Schizocosa mccooki
• Tigrosa grandis

False Wolf (Zoropsidae)

• Lauricius hooki

Ground (Gnaphosidae)

• Mouse (Scotophaeus blackwalli)
• Sergiolus montanus

Funnel Weaver (Agelenidae)

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

Cellar (Pholcidae)

• Pholcophora americana