Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Galloanserae Sibley, Ahlquist & Monroe Jr., 1988 see Subcohort Galloanserae Sibley, Ahlquist & Monroe Jr., 1988
       [Order] Anseriformes Wagler, 1831 - waterfowl and screamers
         Family Anhimidae Stejneger, 1885 - screamers
           Genus Chauna Illiger, 1811
             1 Chauna chavaria (Linnaeus, 1766) - northern screamer
             2 Chauna torquata (Oken, 1816) - southern screamer