Flies are found throughout the world except Antarctica. There are many different species of fly that inhabit different parts of the world.
Flies have a mobile head, with a pair of large compound eyes, and mouth parts that was made for piercing, sucking, or for lapping. Their wing arrangement gives them great maneuverability in flight, and claws and pads on their feet enable them to cling to smooth surfaces.
The adult stage is usually short, its function only to mate and lay eggs.
Normally, the eggs hatch within 24 hours. Fly larvae, better known as maggots, appear similar to whitish worms. Their only purpose is to eat and store energy for their upcoming transformation. Larvae feed for around five days, after they find a dry, dark location for pupal development. The entire life cycle of a fly from egg to adult is 14-36 days.
A new adult fly has at most 3 months to reproduce before it dies. Each female can lay up to 900 eggs during her brief life. With so many predators, the average lifespan is about 21 days.