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] Ciconiiformes Bonaparte, 1854
         Family Ardeidae Leach, 1820 - herons, bitterns and egrets
           Subfamily Ardeinae Leach, 1820
             Genus Syrigma Ridgway, 1878 [monotypic]
               Syrigma sibilatrix (Temminck, 1824) - whistling heron
                 1 Syrigma sibilatrix fostersmithi Friedmann, 1949
                 2 Syrigma sibilatrix sibilatrix (Temminck, 1824)