Neornithes Gadow, 1893 - living birds
Count: [s] 23o;193f;2136g;9595s;8ss; ‡1f;26g;131s
   Neornithes Gadow, 1893 - living birds
  Count: [s] 23o;193f;2136g;9595s;8ss; ‡1f;26g;131s
     Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
    Count: [s] 23o;187f;2121g;9539s; ‡1f;26g;128s
       Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
      Count: [s] 23o;187f;2121g;9539s; ‡1f;26g;128s
         Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988
        Count: [*] 21o;179f;1992g;9095s; ‡1f;23g;120s
           Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988
          Count: [*] 21o;179f;1992g;9095s; ‡1f;23g;120s
             [Order] Charadriiformes Huxley, 1867 - shorebirds, gulls, auks
            Count: [*†*] 17f;86g;360s;438ss; ‡2g;7s;3ss
               Family Alcidae Vigors, 1825 - auks
              Count: [*†*] 10g;23s;30ss; ‡1g;1s
                 Genus Aethia Merrem, 1788
                Count: [*] 4s
                   1 Aethia psittacula (Pallas, 1769) - parakeet auklet
                  Count: -
                   2 Aethia pusilla (Pallas, 1811) - least auklet
                  Count: -
                   3 Aethia pygmaea (Gmelin, 1789) - whiskered auklet
                  Count: -
                   4 Aethia cristatella (Pallas, 1769) - crested auklet
                  Count: -