There are several species of spiders in Alberta, though most of them are not observed in cities like Calgary. However, they become more active during the spring, leading to people getting bitten. Most spiders will avoid confrontation and flee, and generally, spider bites will not cause significant harm, thanks to modern treatments.
Common Spiders: Cross Orb-weaver Spider, Bold Jumping Spider
Big Spiders: Striped Fishing Spider, Dark Fishing Spider
Dangerous Spiders: Western Black Widow Spider, Hobo Spider
