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 Empidonax Cabanis, 1855
                         01 Empidonax flaviventris (W.M. Baird & S.F. Baird, 1843) - yellow-bellied flycatcher
                         02 Empidonax virescens (Vieillot, 1818) - Acadian flycatcher
                         03 Empidonax alnorum Brewster, 1895 - alder flycatcher
                         04 Empidonax traillii (Audubon, 1828) - willow flycatcher
                         05 Empidonax albigularis Sclater & Salvin, 1859 - white-throated flycatcher
                         06 Empidonax minimus (W.M. Baird & S.F. Baird, 1843) - least flycatcher
                         07 Empidonax hammondii (Xántus de Vesey, 1858) - Hammond's flycatcher
                         08 Empidonax wrightii S.F. Baird, 1858 - grey flycatcher
                         09 Empidonax oberholseri A.R. Phillips, 1939 - dusky flycatcher
                         10 Empidonax affinis (Swainson, 1827) - pine flycatcher
                         11 Empidonax difficilis S.F. Baird, 1858 - Pacific-slope flycatcher
                         12 Empidonax occidentalis Nelson, 1897 - Cordilleran flycatcher
                         13 Empidonax flavescens Lawrence, 1865 - yellowish flycatcher
                         14 Empidonax fulvifrons (Giraud, 1841) - buff-breasted flycatcher
                         15 Empidonax atriceps Salvin, 1870 - black-capped flycatcher