#flock  a group of birds
  supertype:  animal_group  a group of animals
  member:  bird
  subtype:  bevy.flock  a flock of quail
  subtype:  covert  a flock of coots
  subtype:  covey  a small flock of grouse or partridge
  subtype:  gaggle  a flock of geese
  subtype:  wisp.flock  a flock of snipe
  subtype:  flight.flock  a flock of flying birds

No statement uses or specializes flock; click here to add one.