Imperium naturae C. Linnaeus, 1758 - nature
   Regnum Animale C. Linnaeus, 1758 - animal kingdom see Kingdom Animalia Linnaeus, 1758
     Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
       1 Order Accipitres Linnaeus, 1758 see Suborder Accipitres (C. Linnaeus, 1758)
       2 Order Picae Linnaeus, 1758 see Parvclass Picae (C. Linnaeus, 1758)
       3 Order Anseres Linnaeus, 1758 see Suborder Anseres Linnaeus, 1758
       4 Order Grallae Linnaeus, 1758
       5 Order Gallinae Linnaeus, 1758
       6 Order Passeres Linnaeus, 1758 see Suborder Passeres (C. Linnaeus, 1758) C. Linnaeus, 1766