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What To Do About Blow Flies In Your Portland Home

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What To Do About Blow Flies In Your Portland Home

Are you seeing green or blue metallic flies buzzing around inside your Portland home? Those pretty flies are called blow flies. But, aside from their bright and shiny coloration, there is nothing pretty about them. These flies can spread many diseases, and they are usually a warning sign of a serious problem. Here's what you should know about blow flies in Portland.


Blow flies don't do well inside Portland homes. These insects feed on decaying organic matter and they lay their eggs in it. The smell of decaying organic matter is repulsive. You're not likely to let a breeding site remain in your home unless it is in a place that is helping to conceal the smell. Most of the time, breeding sites are on the outside of a home, and these flies find a way inside.

Why Blow Flies Are A Warning Sign

If you're seeing lots of these flies in your home, you might have a dead animal inside your home. When mice, rats, bats, squirrels, and other animals get into your wall voids or attic spaces, there is a chance that they can die in these locations. When they do, their rotting carcasses will put off a scent that flies can detect from quite a distance. If you have a wildlife infestation, you should take steps to correct it.

Why Blow Flies Are Bad

When blow flies get into your home, they can expose you to many diseases. There are several reasons.

  • Blow flies lay their eggs in rotting organic matter. Long before these flies take to the air, they are exposed to bacteria that can make you sick.
  • Blow flies feed on feces and ingest microorganisms that are harmful to you.
  • Blow flies regurgitate their stomach contents when they eat. They do this to dissolve the food with their stomach acid. If they decide to eat something you're eating, you can be exposed to disease-causing organisms. Fortunately, your food is not nearly as appetizing to them as something rotting in your trash. But there is a downside to this. Before they walk around on your food, they could have been walking around in your trash.
  • Blow flies feed on the open wounds of livestock, wildlife, and pets. This is just one more way they come in contact with harmful organisms.
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How To Get Rid Of Blow Flies

When these flies start getting inside, you may turn to over-the-counter fly control products, such as fly traps. Be aware that these don't arrest a fly infestation. They just work to reduce the fly population. You need to find the breeding site and stop the infestation at its source.

A common breeding site for blow flies is trash bins. If you forget to put your trash bins out to the curb, you can start to have a fly problem. This is because these flies are attracted by the smell. It is smart to disinfect your bins after missing your weekly trash pick up. Also, make sure you don't have any open trash around your home. Here are a few more common breeding sites for blow flies:

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