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] Galliformes Temminck, 1820 - fowl
         Family Cracidae Vigors, 1825 - chachalacas, curassows, guans
           Subfamily Penelopinae Bonaparte, 1831 - guans
             Genus Ortalis Merrem, 1786
               01 Ortalis vetula (Wagler, 1830) - plain chachalaca
               02 Ortalis cinereiceps Gray, 1867 - grey-headed chachalaca
               03 Ortalis garrula (Humboldt, 1805) - chestnut-winged chachalaca
               04 Ortalis ruficauda Jardine, 1847 - rufous-vented chachalaca
               05 Ortalis erythroptera Sclater & Salvin, 1870 - rufous-headed chachalaca
               06 Ortalis wagleri Gray, 1867 - rufous-bellied chachalaca
               07 Ortalis poliocephala (Wagler, 1830) - West Mexican chachalaca
               08 Ortalis canicollis (Wagler, 1830) - Chaco chachalaca
               09 Ortalis leucogastra (Gould, 1843) - white-bellied chachalaca
               10 Ortalis guttata (Spix, 1825) - speckled chachalaca
               11 Ortalis motmot (Linnaeus, 1766) - little chachalaca
               12 Ortalis superciliaris Gray, 1867 - buff-browed chachalaca