Norway Rat
The Norway rat is a large rodent that colonizes basements and sewers in Montreal. Highly intelligent, it quickly adapts to control methods.
Identification sheet
Health risks
Rats transmit many serious diseases: leptospirosis, salmonellosis, rat-bite fever. They damage structures, gnaw through pipes and electrical wires, and contaminate large amounts of food.
Signs of infestation
- Large capsule-shaped droppings (12 to 20 mm)
- Burrows along foundations
- Gnaw marks on wood and plastic
- Heavy movement noises in walls or ceiling
- Visible runways along walls (grease marks)
- Strong unpleasant odor
Prevention tips
- Seal openings larger than 12 mm with metal mesh
- Keep sewers in good repair
- Don't leave pet food outside
- Remove debris and dense vegetation near foundations
- Ensure trash can lids are tightly closed
- Conduct regular smoke tests
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