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 Anseres nom. inval. see Order Anseres Linnaeus, 1758
             Genus Anas nom. inval. see Genus Anas Linnaeus, 1758
               Querquedula nom. inval. see Anas querquedula Linnaeus, 1758