Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988
       [Order] Passeriformes Linnaeus, 1758
         suboscines see Suborder Suboscines
           Tyranni see Suborder Tyranni
             Family Tyrannidae Vigors, 1825 - tyrant-flycatchers
               Genus Empidonax Cabanis, 1855
                 Empidonax flaviventris (W.M. Baird & S.F. Baird, 1843) - yellow-bellied flycatcher
                 Empidonax traillii (Audubon, 1828) - willow flycatcher
                 Empidonax alnorum Brewster, 1895 - alder flycatcher
                 Empidonax albigularis Sclater & Salvin, 1859 - white-throated flycatcher
                 Empidonax minimus (W.M. Baird & S.F. Baird, 1843) - least flycatcher
                 Empidonax hammondii (Xántus de Vesey, 1858) - Hammond's flycatcher
                 Empidonax oberholseri A.R. Phillips, 1939 - dusky flycatcher
                 Empidonax wrightii S.F. Baird, 1858 - grey flycatcher
                 Empidonax affinis (Swainson, 1827) - pine flycatcher
                 Empidonax difficilis S.F. Baird, 1858 - Pacific-slope flycatcher
                 Empidonax occidentalis Nelson, 1897 - Cordilleran flycatcher
                 Empidonax flavescens Lawrence, 1865 - yellowish flycatcher
                 Empidonax fulvifrons (Giraud, 1841) - buff-breasted flycatcher
                 Empidonax atriceps Salvin, 1870 - black-capped flycatcher
                 Empidonax virescens (Vieillot, 1818) - Acadian flycatcher