Pest Control Ambridge, PA

Hours. Mon-Fri 9AM-5PM, Sat-Sun 9AM-12PM

Address. 805 Duss Ave, Ambridge, PA 15003

Tel. (724) 359-0170

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Blow Flies

The name “blow fly” comes from an English phrase “fly blown” that had to do with meat that had eggs laid on it. Blow flies are unwelcome guests at any meal because of their associations with unsanitary behaviors such as laying eggs on food. They have a particular preference for rotting food as well as excrement and after crawling around on unsanitary things they can land on food items, which can lead to illness and disease.

Adult blow flies are typically shiny and somewhat metallic-looking. They may have blue, black, or green thoracic and abdominal segments. They may occasionally pollinate flowers, especially those that have a very strong odor like that of rotting meat. Flowers that meet these requirements include the American pawpaw and the Dead Horse Arum. Flies may land on the flowers and consume nectar as a source of carbohydrate fuel that they use during flight, however, when, how, and why the flies might consume flower nectar is still not completely understood.

Typically blow flies lay their eggs on dung or carrion and the larvae hatch into maggots which then scavenge the material for food. The eggs themselves are yellow or white in color and look somewhat like pieces of rice. One female may lay as many as 150 to 200 blow fly eggs per batch and 2,000 eggs over the course of her entire lifetime. It isn’t uncommon for blow fly larvae to be found near other larvae on the same carcass. For example, Sarcophagidae, Muscidae, and acalyptratemuscoid flies may also inhabit the same piece of rotting meat or dung.

In order to lay eggs, female blow flies require a substantial amount of protein. Most experts believe that females will visit carrion in order to eat as well as to lay eggs, but this still has not been proven. Blow flies that are hatching from eggs may take about 8 hours to complete the process and progress to the larval stage. Larvae then must pass through three stages of development known as instars. Each stage in the process requires molting. The rate at which they grow will depend on environmental factors as well as the species of blow fly in question. For example, at room temperature, one particular species of blow fly, the Phormiaregina, may be able to progress from the egg stage through the larval stage to pupa within 6 to 11 days. At the end of the third larval stage, the pupa leaves the corpse behind and burrows into the ground. It will emerge within one to two weeks later. Typically blow flies prefer temperate or tropical climates and they will actively seek out layers of very loose, moist soil where they can lay eggs and their larva will survive and be able to pupate.

There are at least 1,100 species of blow flies that are currently known to man. Various species exist in Africa and southern Europe, but the most common Calliphoridae species are found in India, the southern United States, Central America, and Japan.

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