#fly  two-winged insects characterized by active flight
  supertype:  dipterous_insect__dipterousinsect__two-winged_insects__dipteran__dipteron  insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercing
  subtype:  housefly  tsetse_fly  blowfly  flesh_fly  tachina_fly  gadfly  bee_fly  horn_fly
  member of:  order_Diptera
  part:  alula__calypter  scale-like structure between the base of the wing and the halter of a two-winged fly

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