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] Podicipediformes Fürbringer, 1888 [monotypic]
         Family Podicipedidae Bonaparte, 1832 - grebes
           Genus Podiceps Latham, 1787
             Podiceps nigricollis Brehm, 1831 - black-necked grebe
               1 Podiceps nigricollis nigricollis Brehm, 1831
               2 Podiceps nigricollis gurneyi (Roberts, 1919)
               3 Podiceps nigricollis californicus Heermann, 1854