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
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
Hackled Orb-weaver Spiders
- Feather-legged Orb-weaver Spider (Uloborus glomosus)
Woodlouse Hunter Spiders
Purse-web Spiders
