Blow flies typically emerge from which source?

• A. Fresh fruit
• B. Soil
• C. Water
• D. Rotting meat or carcasses

Answer: (D)

Blow flies are tied to carrion. Their life cycle relies on decaying animal tissue for development: eggs are laid on rotting meat or carcasses, hatch into larvae that feed and grow in the carcass, then pupate and emerge as adults. So the source they emerge from is rotting meat or carcasses. Fresh fruit is more typical of fruit flies, while soil or water aren’t the usual sites from which blow flies complete their development. Understanding this helps target sanitation—removing animal remains reduces blow fly breeding and emergences.