Winged ants (nuptial flight)

A mature ant colony seasonally produces winged virgin queens and males. Unfertilized eggs develop into males. Fertilized eggs usually develop into wingless, sterile workers, but may develop into virgin queens if the larvae receive special attention.
Young queens and males stay in their parent colony until conditions are right for the nuptial flight. The flight requires clear weather since rain is disruptive for flying insects. Different colonies of the same species often use environmental cues to synchronize the release of males and queens so that they can mate with individuals from other nests, thus avoiding inbreeding. The actual "take off" from the parent colony is also often synchronized to overwhelm their predators