Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988
         Superorder Passerimorphae Sibley et al., 1988
           Order Passeriformes Linnaeus, 1758
             Suborder Tyranni - suboscines
               Infraorder Tyrannides Sibley et al., 1988
                 Parvorder Tyrannida Wetmore & Miller, 1926
                   Family Tyrannidae Vigors, 1825 - tyrant-flycatchers
                     Subfamily Tyranninae see Family Tyrannidae Vigors, 1825
                       Genus Elaenia Sundevall, 1836
                         Elaenia dayi Chapman, 1929 - great elaenia
                           1 Elaenia dayi tyleri Chapman, 1929 - Duida elaenia
                           2 Elaenia dayi dayiᵀ Chapman, 1929 - great elaenia