Imperium naturæ C. Linnaeus, 1758 - nature
   Mundus Plinius - physical world
     naturalia - natural bodies
       Regnum Animale C. Linnaeus, 1758 - animal kingdom see Kingdom Animalia Linnaeus, 1758
         Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
           Order Picae Linnaeus, 1758 see Parvclass Picae (C. Linnaeus, 1758)
             Genus Ramphastos Linnaeus, 1758
               1 Ramphastos piperivorus Linnaeus, 1758
               2 Ramphastos tucanus Linnaeus, 1758 - red-billed toucan
               3 Ramphastos picatus Linnaeus, 1758
               4 Ramphastos aracari Linnaeus, 1758 see Pteroglossus aracari (C. Linnaeus, 1758)