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
               1 Anas fera nom. inval.
               2 Glaucium nom. inval.
               3 Boschas nom. inval.
               3.0 Anas Domestica nom. inval. see Boschas nom. inval.
               4 Penelope nom. inval.
               5 Querquedula nom. inval. see Anas querquedula Linnaeus, 1758