Dance flies

Definition

A family of small predatory flies (Hybotidae) characterized by a distinctive hovering, dancing flight pattern during mate-seeking and courtship. Formerly treated as a subfamily of Empididae, they are now recognized as a distinct family within the superfamily Empidoidea. Adults typically have a humpbacked thorax, reduced wing venation, and raptorial forelegs adapted for seizing prey; larvae are generally found in soil, leaf litter, or decaying organic matter.

Etymology

From the characteristic hovering, bobbing flight of males during mating swarms.

Example

Male dance flies of the genus Bicellaria form aerial swarms near streamside vegetation, where they perform complex hovering maneuvers to attract females; some species offer captured prey as nuptial gifts.

Synonyms

• Hybotidae

Related Terms

• Empidoidea
• Empididae
• predatory flies
• Nuptial gift
• mating swarm
• true flies
• Diptera

Usage Notes

The common name applies specifically to Hybotidae, not to be confused with 'dance flies' used loosely for related Empididae (empidid dance flies). The distinction reflects modern phylogenetic taxonomy: Hybotidae are the 'typical' dance flies, while Empididae contains additional dance fly lineages. The term is primarily used in European and North American faunistic literature.