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 Fregatidae Degland & Gerbe, 1867 - frigatebirds
           Genus Fregata Lacépède, 1799
             Fregata ariel (Gray, 1845) - lesser frigatebird
               1 Fregata ariel trinitatis Miranda-Ribeiro, 1919
               2 Fregata ariel iredalei Mathews, 1914
               3 Fregata ariel ariel (Gray, 1845)