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Spider

Spiders are generally harmless and useful as they eat other insects. However, a significant infestation often indicates the presence of other pests.

Spider

Identification sheet

Appearance
Eight legs, body in two parts (cephalothorax and abdomen). Common species in Montreal are brown or grey.
Size
2 to 20 mm (depending on species)
Color
Brown, grey or black
Habitat
Dark corners, basements, attics, garages, behind furniture. Near windows and light sources that attract insects.
Lifespan
1 to 2 years
Danger level
Very low

Health risks

Most spiders in Quebec are harmless. Some people may have allergic reactions to bites. The presence of many spiders often indicates a larger insect problem.

Signs of infestation

  • Cobwebs in corners and crevices
  • Visible spiders in the house
  • White egg sacs in webs
  • Increased presence of other insects (prey)
  • Webs in basement and garage
  • Spiders near windows and doors

Prevention tips

  • Eliminate other insects that serve as prey
  • Regularly vacuum cobwebs
  • Seal exterior cracks and openings
  • Reduce outdoor lighting that attracts insects
  • Declutter basement and garage
  • Keep vegetation away from the house

Think you have spider?

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