How many wings do flies belong to the order of Diptera have?

Flies, which are classified under the order Diptera, possess one set of wings, which is a defining characteristic of this order. The term "Diptera" itself is derived from Greek, with "di-" meaning two and "ptera" meaning wings, referring to the single pair of functional wings that adult flies have. In Diptera, the second pair of wings is reduced to small structures known as halteres, which play a crucial role in balance and stabilization during flight. This unique wing structure distinguishes Diptera from other insects, which often have two sets of wings. The presence of only one pair allows for a specialization in aerial maneuvers.