Blow flies typically emerge from

• A. Sewers and drain pipes
• B. Potted plants
• C. Trash and compost
• D. Rotting meat or carcasses

Answer: (D)

Blow flies breed and complete their development in decaying animal tissue, so the place where you typically find them emerging as adults is from rotting meat or carcasses. Eggs are laid on decomposing flesh, hatch into maggots that feed there, then pupate, and the adult fly emerges from those pupal cases. This makes rotting meat or carcasses the correct source for their emergence. The other options don’t provide the same breeding environment for blow flies—sewers and drain areas are more typical for other flies, and while trash or compost can attract flies, blow flies specifically rely on carrion for their development. In practice, finding and removing the decomposing source is key to control.