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 Picae nom. inval. see Order Picae Linnaeus, 1758
             38 Genus Ramphastos Linnaeus, 1748 see Genus Ramphastos Linnaeus, 1758
             39 Genus Buceros Linnaeus, 1748, nom. inval. see Genus Buceros Linnaeus, 1758
             40 Genus Corvus nom. inval. see Genus Corvus Linnaeus, 1758
             41 Genus Picus nom. inval. see Genus Picus Linnaeus, 1758
             42 Genus Jynx nom. inval. see Genus Jynx Linnaeus, 1758
             43 Genus Cuculus nom. inval. see Genus Cuculus Linnaeus, 1758
             44 Genus Paradisaea nom. inval. see Genus Paradisaea Linnaeus, 1758
             44.0 Genus "Paradisea" nom. inval. see Genus Paradisaea nom. inval.
             45 Genus Upupa nom. inval. see Genus Upupa Linnaeus, 1758
             46 Genus Ispida nom. inval. see Genus Merops Linnaeus, 1758