Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988
         Superorder Passerimorphae Sibley et al., 1988
           Order Ciconiiformes Bonaparte, 1854
             Suborder Ciconii see Suborder Ciconiae Bonaparte, 1854
               Infraorder Ciconiides see Suborder Ciconiae Bonaparte, 1854
                 Parvorder Ciconiida see Suborder Ciconiae Bonaparte, 1854
                   Superfamily Procellarioidea Fürbringer, 1888
                     Family Procellariidae Leach, 1820 - petrels, shearwaters
                       Subfamily Procellariinae Vigors, 1825 see Family Procellariidae Leach, 1820
                         01 Genus Macronectes Richmond, 1905
                         02 Genus Fulmarus Stephens, 1826
                         03 Genus Thalassoica Reichenbach, 1853
                         04 Genus Daption Stephens, 1826
                         05 Genus Pagodroma Bonaparte, 1856
                         06 Genus Pterodroma Bonaparte, 1856
                         07 Genus Halobaena Bonaparte, 1856
                         08 Genus Pachyptila Illiger, 1811
                         09 Genus Bulweria Bonaparte, 1843
                         10 Genus Procellaria Linnaeus, 1758
                         11 Genus Calonectris Mathews & Iredale, 1915
                         12 Genus Puffinus Brisson, 1760
                         13 Genus Pelecanoides Lacépède, 1799