Spiders in Ontario

Spiders are most active in Ontario from late spring to early fall. Not only are they more visible, but their presence is often felt through the nearly invisible webs they spin. There aren’t too many dangerous spiders in Ontario, the most deadly being the western black widow, feared for its potent venom.

Common Spiders: Black-footed Yellow Sac Spider, Common House Spider

Biggest Spiders: Dark Fishing Spider, Striped Fishing Spider

Deadliest Spiders:  Western Black Widow Spider, Eastern Parson Spider

Spiders in Ontario

Most Venomous

Comb-footed Spiders

  • Western Black Widow Spider (Latrodectus hesperus)

Sac Spiders

  • Black-footed Yellow Sac Spider (Cheiracanthium inclusum)
  • Long-legged Sac Spider (Cheiracanthium mildei)

Funnel Weaver Spiders

Ground Spiders

  • Eastern Parson Spider (Herpyllus ecclesiasticus)

Less Venomous

Orb-weaver Spiders

Wolf Spiders

  • Sand Bear Wolf Spider (Arctosa perita)

Hacklemesh Weaver Spiders

Crab Spiders

  • Utah Crab Spider (Bassaniana utahensis)
  • Golden-rod Crab Spider (Misumena vatia)

Nursery Web Spiders

Funnel Weaver Spiders

Jumping Spider

Comb-footed Spiders

Intertidal Spiders

  • Metaltella simoni

Hackled Orb-weaver Spiders

  • Feather-legged Orb-weaver Spider (Uloborus glomosus)

Woodlouse Hunter Spiders

Purse-web Spiders