What are cluster flies, and how are they different from house flies?

Q.

Cluster flies are slower, larger, and quieter than house flies. They don’t breed indoors or feed on garbage—they enter homes and cottages to hibernate during fall and winter.

Are cluster flies harmful to my home, cottage, or business?

Q.

While not dangerous, cluster flies are a major nuisance. Their droppings can stain walls and windows, and large infestations can disrupt homes and workplaces.

What attracts cluster flies to Ontario properties?

Q.

Cluster flies are drawn to sunny sides of buildings and warm upper floors. Homes and cottages near open farmland or fields are especially prone to infestations.