What is a characteristic feature of flies?

Flies are characterized by having two wings, specifically one pair, which distinguishes them from many other insects that may have two pairs of wings. This unique wing structure plays a crucial role in their ability to fly and maneuver.

The presence of hairs on their wings, while observable in some species, particularly serves specific functions such as sensing movement and helping to stabilize flight. This feature contributes to their adaptability in various environments and supports their role as both pollinators and pests.

In distinguishing features, the absence of wings, having multiple pairs of wings, or relying solely on body coloration do not accurately represent the common traits of flies. Hence, the characteristic that they have hairs covering their wings accurately reflects certain anatomical and functional features of many fly species.