Diptera
Flies have a mobile head, with a pair of large compound eyes, and mouthparts designed for piercing and sucking, or for lapping and sucking in the other groups. Their wing arrangement gives them great maneuverability in flight, where its name was derived from the greek word "dipetron", meaning two wings.
Flies undergo complete metamorphosis; the eggs are laid on the larval food-source and the larvae, which lack true limbs, develop in a protected environment, often inside their food source. The pupa is a tough capsule from which the adult emerges when ready to do so; flies mostly have short lives as adults.
Source of wordings: https://en.wikipedia.org/wiki/Fly
