Imperium naturae C. Linnaeus, 1758 - nature
   Regnum Animale C. Linnaeus, 1758 - animal kingdom see Kingdom Animalia Linnaeus, 1758
     Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
       Order Anseres Linnaeus, 1758 see Suborder Anseres Linnaeus, 1758
         67 Genus Anas Linnaeus, 1758 - Pacific black duck
         68 Genus Mergus Linnaeus, 1758
         69 Genus Alca Linnaeus, 1758
         70 Genus Procellaria Linnaeus, 1758
         71 Genus Diomedea Linnaeus, 1758
         72 Genus Pelecanus Linnaeus, 1758
         73 Genus Plotus C. Linnaeus, 1766
         74 Genus Phaëton Linnaeus, 1758 see Genus Phaethon Linnaeus, 1758
         75 Genus Colymbus Linnaeus, 1758
         76 Genus Larus Linnaeus, 1758
         77 Genus Sterna Linnaeus, 1758
         78 Genus Rynchops Linnaeus, 1758
         78.0 Genus Rhyncops Linnaeus, 1758 see Genus Rynchops Linnaeus, 1758