Female-ornamentation

Guides

• Rhamphomyia

  dance flies

  Rhamphomyia is a large genus of dance flies (Empididae) comprising over 600 species arranged in 8 subgenera. The genus exhibits remarkable diversity in mating systems, including sex-role reversal where females compete for mates and males provide nuptial gifts. Several species display elaborate visual ornaments used in courtship, such as inflatable abdominal sacs and modified leg scales. The genus has a cosmopolitan distribution with particular diversity in the Holarctic region, including specialized radiations in arctic tundra environments.

  Empididaedance-fliessex-role-reversalnuptial-giftssexual-selectionarctic-insectsswarming-behaviorsexual-dimorphismHolarctic-distributionpredatory-fliesfemale-ornamentationmate-choicecitizen-scienceinsect-behaviorevolutionary-ecology

• Rhamphomyia longicauda

  Long-tailed Dance Fly

  Rhamphomyia longicauda is a dance fly species renowned for its exceptional sex-role reversal in mating behavior. Females form aerial leks at dawn and dusk, displaying inflated abdominal sacs and ornamental leg scales to attract males, who are the choosy sex. Females are obligate recipients of nuptial gifts—prey items captured by males—because they cannot hunt for themselves. This nutritional dependence drives the reversal of typical courtship roles. The species has been extensively studied as a model for sexual selection and the evolution of female ornamentation.

  sex-role-reversalnuptial-giftslekkingfemale-ornamentationsexual-selectionpredation-riskaerial-swarmingEmpididaeDiptera