Imperium naturæ C. Linnaeus, 1758 - nature
   Mundus Plinius - physical world
     naturalia - natural bodies
       Regnum Animale C. Linnaeus, 1758 - animal kingdom see Kingdom Animalia Linnaeus, 1758
         Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
           Order Picae Linnaeus, 1758 see Parvclass Picae (C. Linnaeus, 1758)
             Genus Coracias Linnaeus, 1758
               1 Coracias garrulus Linnaeus, 1758 - European roller
               2 Coracias caffra Linnaeus, 1758
               3 Coracias oriolus Linnaeus, 1758 see Oriolus oriolus (C. Linnaeus, 1758)
               4 Coracias galbula Linnaeus, 1758 see Icterus galbula (C. Linnaeus, 1758)
               5 Coracias aurea Linnaeus, 1758 see Sericulus aureus (C. Linnaeus, 1758)
               6 Coracias xanthornus Linnaeus, 1758 see Oriolus xanthornus (C. Linnaeus, 1758)