Bluish green flies usually indicate which source?

• A. Fresh produce
• B. Carcass
• C. Sewer
• D. Wet garbage

Answer: (B)

Bluish-green bottle flies are blow flies that are strongly attracted to decomposing animal tissue. Their presence usually signals a hidden source of carrion nearby, such as a dead animal inside walls, a crawl space, or a recently discarded carcass. Fresh produce tends to attract fruit flies, sewers attract drain flies, and wet garbage draws other flies, but the bluish-green bottle flies specifically indicate decaying animal matter as the source. When you see them, the next step is to locate and remove any dead animal material and sanitize the area.