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Along the Williams River in Chester, Victorian-era homes face ongoing cluster flies pressure from the moisture-rich valley environment. Older structures have gaps that allow entry. From properties near the historic district to homes throughout Windsor County, Purely Nature's Way provides natural cluster flies control that protects families and structures. Our technicians address both the infestation and the moisture conditions that attract cluster flies to Chester properties.
About
Cluster Flies
Pests We Treat
Cluster Flies
Peak Season
Seasonal
Signs Of Infestation
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Large sluggish flies in sunny windows during winter
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Clusters in attics and wall voids
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Slightly larger and darker than house flies
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Golden hairs on thorax
Our Treatment Approach
Natural-first solutions that actually work
Physical exclusion is the primary long-term solution. Diatomaceous earth in attic spaces and wall voids. Light traps capture active adults. Botanical pyrethrin for knockdown of active flies. We time exterior treatments for late summer prevention before invasion. Given Chester's moisture conditions, we pay special attention to drainage and humidity control.
Prevention Tips
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Seal gaps at roofline, soffits, and eaves
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Caulk around windows and utility penetrations
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Ensure attic vents have fine screening
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Seal gaps where siding meets foundation
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Address before late summer invasion
Frequently Asked Questions
Where do cluster flies come from?
Cluster flies are parasites of earthworms and develop outdoors in soil. In late summer, adults seek sheltered overwintering sites in buildings. They're not related to filth or sanitation—even the cleanest homes near lawns can have cluster flies.
Do cluster flies breed indoors?
No, cluster flies cannot breed indoors. They only use buildings for winter shelter. Flies you see emerged from the same overwintering population that entered in fall. Larvae develop only in earthworm hosts outdoors in soil.
Why do Chester homes have more cluster flies problems?
Chester's proximity to water creates humidity that cluster flies thrive in. We address both the immediate infestation and the underlying moisture conditions that attract these pests.

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