Phylum Chordata Bateson, 1885 - chordates
   Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
     Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
       Superorder Neognathae Pycraft, 1900 see Cohort Neognathae Pycraft, 1900
         Order Charadriiformes Huxley, 1867 - shorebirds, gulls, auks
           1 Suborder Charadrii Huxley, 1867 - shorebirds see Order Charadriiformes Huxley, 1867
           2 Suborder Lari Sharpe, 1891 - gulls and allies
           3 Family Alcidae Vigors, 1825 - auks