Quick ID

Slow indoor flies that overwinter in wall voids and attics.

Key features: dark grey body, golden hairs on thorax. Habitat: attics, wall voids, and window pockets. Signs: clusters of inactive flies, fly spots on windowsills.

Overview

Cluster Fly is a common insect in Ontario that often appears around homes and property. This profile covers the lifecycle, habitat, and pest behavior in both indoor and outdoor settings.

Identification

Look for the following signs: cluster fly appearance, typical tracks, droppings, webs, or chew marks. Ontario observers often find this species in kitchens, basements, window frames, and outdoor structures.

Habitat and behavior

Cluster Fly typically prefers warm, dark crevices and sites with food sources in Ontario. During the growing season, it may move closer to homes seeking shelter and food.

Signs of activity

Common evidence includes sightings, damage to wood or plants, nests, and odor. Monitor the area carefully to confirm the pest and avoid misidentifying similar species.

Prevention

Reduce attractants by sealing entry points, removing food sources, maintaining good sanitation, and keeping vegetation trimmed. For Ontario homes, inspect foundations, window seams, door sweeps, and roof vents regularly.

Treatment

Use traps, baits, exclusion, or targeted treatments depending on the pest. Always choose products approved for Ontario and read the label before applying them indoors or near pets.

When to call a professional

Call a licensed exterminator if the pest persists, if large numbers appear, if structural damage is present, or if you are unsure about identification. Professionals can safely remove the pest and suggest long-term control.