In Ref. to The Quran Chapter 22: verse 73.
In all there are over 120,000 species of flies ranging in size from 1/20th of an inch to well over three inches.
One of the things that separate Flies ( Diptera) from other flying insects are their wings. Flies are the only insects that have only two. All other insects have four wings.
Flies don't bite or sting. They have neither teeth nor a stinger. Flies thrust a needle like spike into their victims and injects adigestive juice
that breaks down the victims cell tissue. They then suck the liquid in to injest it.
Some facts about ALLAH's creation the House Fly.
The average house fly lives on average 21 days.
A flies wings beat 200 times per second.
Flies don't grow. They are born full size.
Flies have 4000 lenses in each eye.