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 Corvus Linnaeus, 1758
               01 Corvus corax Linnaeus, 1758 - common raven
               02 Corvus corone Linnaeus, 1758 - carrion crow
               03 Corvus frugilegus Linnaeus, 1758
               04 Corvus cornix Linnaeus, 1758 see Corvus corone cornix Linnaeus, 1758
               05 Corvus monedula Linnaeus, 1758 - Eurasian crow
               06 Corvus benghalensis Linnaeus, 1758 see Coracias benghalensis (C. Linnaeus, 1758)
               07 Corvus glandarius Linnaeus, 1758 see Garrulus glandarius (C. Linnaeus, 1758)
               08 Corvus cristatus Linnaeus, 1758 see Cyanocitta cristata (C. Linnaeus, 1758)
               09 Corvus caryocatactes Linnaeus, 1758 see Nucifraga caryocatactes (C. Linnaeus, 1758)
               10 Corvus pica Linnaeus, 1758 see Pica pica (C. Linnaeus, 1758)
               11 Corvus paradisi Linnaeus, 1758 see Terpsiphone paradisi (C. Linnaeus, 1758)
               12 Corvus infaustus Linnaeus, 1758 see Perisoreus infaustus (C. Linnaeus, 1758)