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Condo Fly Problem: Cluster Flies vs. Green Bottle Flies

Friend has multi-year fly issue; exterminator says green bottle flies but behavior matches cluster flies (mid-late summer, bathroom/window). Condo clean; neighbors unaffected. Asks where to send specimen for analysis.

Expert Answer: Cluster flies have golden hairs behind head (image); green bottle flies are metallic green and rarely indoors. Description matches cluster flies. Best to take specimen to county Extension office (extension.org).

— Jack DeAngelis

Pests: Persistent Fruit Flies in Kitchen: Find the Breeding Source, Not Just Traps; Drain Fly Follow-Up: Leaky Toilet Seal May Have Been the Source; Tiny Wingless Black Bugs in Basement Apartment: Fungus Gnats or Drain Flies?; Persistent Drain Flies: Seal Drains, Rule Out Fungus Gnats, Check for Slime; Drain Flies: Eliminate Organic Gunk with Enzyme Cleaners; Hibiscus Whitefly Control: Hose and Alcohol Spray; Indoor vs. Outdoor Fly Traps: Choosing the Right Solution; Tachinid Flies: Tiny Parasitoids That Control Garden Pests; Fly Control: Forget Black Powder, Use Flypaper and Eliminate Breeding Sites; Controlling Flies on House Walls

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