Flies are insects. They have short and/or streamlined bodies, large compound eyes, single pair of wings.

Other insects with "fly" in their names, like dargonfly, have two pairs of wings.

There are many different kinds of flies. There are more than 120,000 species of flies worldwide.

Flies lay eggs close to their food source. Fly eggs can hatch immediately after being laid.

Baby flies are called larvae. They are also called maggots. They have no true legs. Maggots eat damaged flesh and help burn patients heal.

Flies live a short life. They live only an average of 21 days or shorter.

Flies often represent death and horror in books and movies.