Natura - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Animale Regnum 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
             47 Genus Phoenicopterus Linnaeus, 1748 see Genus Phoenicopterus Linnaeus, 1758
             48 Genus Anas nom. inval. see Genus Anas Linnaeus, 1758
             49 Genus Mergus nom. inval. see Genus Mergus Linnaeus, 1758
             50 Genus Pelecanus nom. inval. see Genus Pelecanus Linnaeus, 1758
             51 Genus Colymbus nom. inval. see Genus Colymbus Linnaeus, 1758
             52 Genus Alca nom. inval. see Genus Alca Linnaeus, 1758
             53 Genus Larus nom. inval. see Genus Larus Linnaeus, 1758
             54 Genus Sterna nom. inval. see Genus Sterna Linnaeus, 1758