Blue Bottle Flies

Facts, Identification, & Control

Scientific Name

Calliphora vomitoria

Appearance

What Do They Look Like?
  • Size: Blue bottle flies are about the same size as house flies.
  • Body: Their distinctive blue body also features black legs and antennae.
  • Color: The pests are metallic blue in color with tan or white larvae that resemble grubs.
  • Eyes: Adults have large red eyes and clear wings.

How Did I Get Blue Bottle Flies?

These insects typically fly inside through the doors or windows of homes with a ready food supply. They will also often fly inside looking for a place to overwinter and escape the harsh conditions of winter.

What Attracts Them

Because they eat decaying flesh, blue bottle flies in the house sometimes indicate a decomposing animal in an attic or wall void. Outdoors, dead and decomposing animal carcasses, pet feces, and trash attract them, as well.

How Serious Are Blue Bottle Flies?

Blue bottle flies in homes can transmit diseases and bacteria between hosts. The risk increases if these pests feed on foods that humans consume. A blue bottle fly might spread illnesses like:

  • Conjunctivitis
  • Dysentery
  • Food Poisoning

Signs of Infestation

The presence of the pest is the best indicator of blue bottle fly infestations. Adults are easier to spot, so regularly noticing them indoors often means there are flies breeding in the house. Trash, meat, and windows are all common resting spots.

How Do I Get Rid of Blue Bottle Flies?

What You Can Do

Dealing with blue bottle flies in the house begins with locating the source of infestation. Removing outdoor sources of blue bottle fly infestations is also an effective preventive measure, in addition to:

  • Cleaning compost bins and checking mouse traps to remove potential breeding sites.
  • Keeping doors closed and properly screened in the summer months will help prevent access to living spaces.
What Orkin Does

Your local Orkin technician is trained to help manage blue bottle flies and similar pests. Since every building or home is different, your Orkin technician will design a unique program for your situation.

Orkin can provide the right solution to keep blue bottle flies in their place…out of your home, or business.


Behavior, Diet, & Habits

What Do They Eat?

This fly species consumes rotting organic matter, including animal carcasses or garbage.

Where Do They Live?

Blue bottle flies in homes appear around areas with food waste. The insects also make a buzzing sound, and many residents find them near light sources.

Life Cycle

Blue bottle flies deposit their eggs in decomposing tissue. After larvae hatch, they feed on the surrounding meat. When ready to pupate, the pests head to drier environments.

The blue bottle fly life cycle from egg to adult fly can take as little as seven days, but generally requires about 2 weeks .