Imperium naturæ C. Linnaeus, 1758 - nature
Status: extant
   Mundus Plinius - physical world
  Status: extant
     naturalia - natural bodies
    Status: extant
       Regnum Animale C. Linnaeus, 1758 - animal kingdom see Kingdom Animalia Linnaeus, 1758
      Status: extant
         Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
        Status: extant
           Order Picae Linnaeus, 1758 see Parvclass Picae (C. Linnaeus, 1758)
          Status: extant
             Genus Merops Linnaeus, 1758
            Status: extant
               1 Merops apiaster Linnaeus, 1758 - European bee-eater
              Status: extant
               2 Merops viridis Linnaeus, 1758 - blue-throated bee-eater
              Status: extant
               3 Merops cinereus Linnaeus, 1758
              Status: extant
               4 Merops cafer Linnaeus, 1758 see Promerops cafer (C. Linnaeus, 1758)
              Status: extant