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
         oscines see Suborder Oscines
           Passerida - passeridans see Parvorder Passerida (C. Linnaeus, 1758) Sibley et al., 1988
             Family Reguliidae - goldcrests see Family Regulidae Vigors, 1825
               Genus Regulus Cuvier, 1800
                 1 Regulus ignicapilla (Temminck, 1820)
                 2 Regulus goodfellowi Ogilvie-Grant, 1906
                 3 Regulus regulus (C. Linnaeus, 1758)
                 4 Regulus satrapa M.H.K. Lichtenstein, 1823 - golden-crowned kinglet
                 5 Regulus calendula (C. Linnaeus, 1766) - ruby-crowned kinglet