What are Flies?

A flying insect of a large order characterized by a single pair of transparent wings and sucking (and often also piercing) mouthparts. Flies are noted as vectors of disease.

Quick Facts

  • Flies have a mobile head, with a pair of large compound eyes, and mouthparts designed for piercing and sucking (mosquitoes, black flies and robber flies), or for lapping and sucking in the other groups.
  • The adult stage is usually short, its function only to mate and lay eggs.

House Flies

  • The female may lay a total of 5-6 batches of 75-100 eggs.
  • More than 100 pathogens associated with the House Fly.
  • Passes through all of the life cycles in about 10 days.


  • Long-legged, but are weak fliers.
  • Contrary to popular belief, they are adults rather than "Baby flies".
  • Fruit Flies often misinterpreted as Gnats.
  • There are many variations of the Gnat.

Blow Flies

  • Approximately 80 species of Blow Flies in North America.
  • Blow fly larvae are also known as maggots.
  • Eggs -> Larvae -> Pupa -> Adult

Fruit Flies

  • Adults are 3-4mm long, very small.
  • Fruit Flies eat ripened fruit, vegetables, and fermenting problems.
  • Adult Fruit Flies live up to 30 days.