Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       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 "Accipitres" Plinius, nom. inval.] see Order Accipitres Linnaeus, 1758
               [Genus "Strix" nom. inval.] see Genus Strix Linnaeus, 1758
                 1 ["Bubo" Plinius, nom. inval.]
                 2 ["Otus" Plinius, nom. inval.]
                 3 ["Noctua" Plinius, nom. inval.]
                 4 ["Ulula" nom. inval.]