Winter drives pests indoors in search of warmth and food. In Southern Ontario, the most common cold-season invaders include:
1. Mice – They enter through gaps as small as a dime.
2. Rats – Often found in basements or garages.
3. Cluster Flies – Harmless but annoying; they overwinter in wall voids.
4. Spiders – Beneficial outdoors, but unwanted indoors.
5. Raccoons – Seeking shelter in attics and garages.
Early signs include scratching noises, droppings, foul odours, or unusual activity in attics. If you suspect an issue, address it early—winter infestations grow quickly.
Winter may be cold, but pests are warming up inside your home. Here are the top invaders to watch for this season.