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
           Suborder Charadrii Huxley, 1867 - shorebirds see Order Charadriiformes Huxley, 1867
             Family Recurvirostridae Bonaparte, 1831 - stilts, avocets
               Genus Recurvirostra Linnaeus, 1758
                 Recurvirostra americana Gmelin, 1789 - American avocet
                 Recurvirostra andina Philippi & Landbeck, 1861 - Andean avocet
                 Recurvirostra avosetta Linnaeus, 1758 - pied avocet
                 Recurvirostra novaehollandiae Vieillot, 1816 - red-necked avocet