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)

Spiders in Colorado Identification Chart

Highly Venomous Spiders

Cobweb (Theridiidae)



Less Venomous Spiders


Cobweb (Theridiidae)

  • Steatoda grandis

Orb-Weavers (Araneidae)

Nursery Web (Pisauridae)

Jumping (Salticidae)

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)

Cellar (Pholcidae)

  • Pholcophora americana