Overview of the Fly Diet

Many species of flies are found throughout our service area. Each one tends to have distinct feeding habits and favorite sources of sustenance.

For instance, the common house fly is known to feed on human food, garbage, and excrement, whereas fruit flies and drain flies typically feed on fermenting liquids or other decaying organic materials found in homes.

Blowflies mostly eat the flesh of dead animals, which may include dead birds or rodents found in a home, while cluster flies enter homes in the fall seeking out a warmer place to overwinter.

The most common food sources of fruit flies include:

  • Fruit juice
  • Soda
  • Beer

The pests are also capable of turning solid foods into liquid with the enzymes found in their saliva. Since they defecate where they eat, flies regularly contaminate the food they consume.

fruit fly
Fruit fly

Flies may feed on the following:

  • Human food
  • Garbage
  • Excrement
  • Fermenting liquid
  • Decaying materials
  • Dead animals
  • Juice
  • Soda
  • Beer

Additionally, they tend to lay their eggs in established food sources, which allows larvae to eat as soon as they hatch. Also called maggots, larvae will feed on:

  • Detritus
  • Dead animals
  • Fungi
  • Plants
  • Decaying produce


The best way to ensure your home doesn’t become a haven for flies is to:

  • Eliminate easy access to food sources – Many fly infestations are directly connected to bad sanitation and improper food handling.
  • Store food correctly – Storing food improperly and leaving ripening fruits and vegetables out too long both readily attract flies to homes.

Once inside, flies reproduce rapidly, using untended food, garbage, and dirty drains as breeding grounds.

Eliminating Flies

  • Take out the trash – Keep up with sanitation
  • Sealed containers – Storing food properly helps reduce the possibility of attracting flies: place food in sealed containers
  • Lids on trash cans – Put trash in receptacles with secured lids
  • Sink and plumbing – Eliminating mildew, soap scum, and other bacteria found in kitchen and bathroom plumbing should help limit drain flies from reproducing, as well

For any present fly infestations, homeowners should contact a trained specialist from Western Pest, who can eliminate the pests and offer tips to keep them from returning.

Learn more about Fly Control or more about Western’s comprehensive Home Pest Control Plans.

Call for service: (877) 250-3857