Spider Prevention & Guide

Colour  - Yellowish-brown with darker markings

Size - Small body, about 5–8 mm

Habitat - Corners of ceilings, basements, closets, garages

Summary

These are the spiders most people see indoors. They build messy cobwebs in out-of-the-way spots and feed on other insects. They’re harmless to humans and often go unnoticed until webs become more obvious.

Colour  - Brown or grey with a hairy body and long legs

Size - 10–35 mm (some are quite large)

Habitat - Near doors, windows, basements, and garages—often on the ground

Summary

Unlike web-builders, wolf spiders are hunters. They don’t spin webs, instead chasing down prey. They may look intimidating due to their size, but they are not dangerous. Occasionally, they wander inside by mistake.

Colour  - Pale yellow or light grey

Size - Tiny body with very long, thin legs

Habitat - Basements, storage rooms, crawlspaces

Summary

Often found hanging upside down in corners, cellar spiders are harmless and fragile. They spin small, loose webs and eat other spiders and insects.

Colour  - Glossy black with a red hourglass marking on the underside

Size - 10–15 mm

Habitat - Occasionally in woodpiles, sheds, or cluttered outdoor areas

Summary

Black widows are rarely found in Calgary, but it’s good to be cautious. They’re shy and avoid contact, but their bite is venomous. If bitten, seek medical attention right away.