Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Animale nom. inval. - animal kingdom see Kingdom Animalia Linnaeus, 1758
         Class Aves Plinius, nom. inval. - birds see Class Aves Linnaeus, 1758
           Order Gallinae nom. inval. see Order Gallinae Linnaeus, 1758
             Genus Tetrao nom. inval. see Genus Tetrao Linnaeus, 1758
               1 Phasianus Plinius, nom. inval.
               2 Urogallus nom. inval.
               3 Tetrao Plinius, nom. inval.
               4 Bonasia nom. inval.
               5 Lagopus Plinius, nom. inval.
               6 Perdix Plinius, nom. inval.
               7 Coturnix Plinius, nom. inval.