Bottle / Blow / Flesh Flies
Blow and bottle flies (Calliphoridae species) are distinctly metallic, blue, green or brassy in color, and adults have feathery antennae. Flesh flies are dark black or with grey stripes and hairy. The adult flies are strong fliers and are attracted to light traps. The larvae develop in carrion, meat and fish, as well as in animal manure, rotting vegetation and garbage cans that are not carefully cleaned. The larvae are spindle-shaped maggots that are 3/8” to 7/8” long.
Bottle, Blow & Flesh Fly Habits
Blow, or bottle flies, have a complete life cycle. Their eggs hatch rapidly, often in as little as 8 hours. The larvae initially feed on the surface and eventually burrow into the substrate. The adult flies feed on liquids associated with the larval developmental substrate. Adults are strong fliers and have the ability to sense the odors of dead or dying animals. The adult flies can be annoying, since they are attracted to lights and make a distinct “buzzing” as they fly around lights. If you have more than the occasional fly, there is a dead animal or some type of carrion in which they are developing.
Questions To Ask About Bottle, Blow & Flesh Flies
- Where are you seeing them?
- Do you have a pet dog?
- Where do pets go to the bathroom?
- Have you smelled a dead animal recently?
- How frequently do you take out your garbage?
- Have you had any birds nesting in the structure?
Bottle, Blow & Flesh Fly Inspection Tips
Pay particular attention to vents, wall voids, front porch slabs and attic areas. Look for bird nests, or other nesting sites, and places animals have been resting or raising young. Look for accumulations of pet droppings, rotting leaves or grass clippings. Check garbage containers for cleanliness. Black blow flies often develop in the bottom of dirty garbage containers. Make sure garbage is being discarded on a regular basis; accumulated garbage is a good breeding site. Check the sanitation schedule for waste containers.
