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 Macrorhynchae nom. inval. see Order Grallae Linnaeus, 1758
             Genus Grus nom. inval. see Genus Ardea Linnaeus, 1758
               1 Grus Plinius, nom. inval.