Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988
       [Order] Pelecaniformes Sharpe, 1891
         Family Sulidae Reichenbach, 1849 - gannets, boobies
           Genus Sula Brisson, 1760
             Sula sula (Linnaeus, 1766) - red-footed booby
               1 Sula sula sula (Linnaeus, 1766)
               2 Sula sula rubripes Gould, 1838
               3 Sula sula websteri Rothschild, 1898