House Flies in Ontario
House fly identification, entry prevention and sanitation priorities for Ontario properties.
What house flies look like
House flies are medium-sized grey flies with four darker stripes on the thorax. They frequently move between waste, food areas and sunny windows.
Where activity develops
They breed in decaying organic material and waste. Adult pressure can also come from nearby exterior sources and open doors.
Signs worth documenting.
Repeated flies in food areas
Adults gathering at windows
Activity associated with waste or doors
Make the property less favourable.
Prevention depends on correct identification and the conditions supporting activity. These steps are a practical starting point.
Identification before treatment
Similar-looking pests can require very different responses. Avoid applying a product until the pest, location and permitted label directions are clear.
Serving Eastern Ontario
Emerald Pest Control serves Belleville, Kingston, Trenton, Napanee, Brighton, Stirling, Picton, Quinte West and surrounding communities.
Not sure whether it is house flies?
Send a clear photo and tell us where it was found. We can help confirm the pest and discuss appropriate next steps.