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] Gruiformes Bonaparte, 1854
         Family Eurypygidae Selby, 1840 [monotypic] - sunbittern
           Genus Eurypyga Illiger, 1811 [monotypic]
             Eurypyga helias (Pallas, 1781) - sunbittern
               1 Eurypyga helias major Hartlaub, 1844
               2 Eurypyga helias meridionalis Berlepsch & Stolzmann, 1902
               3 Eurypyga helias helias (Pallas, 1781)