Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
Ref: B.L. Monroe Jr. & C.G. Sibley, 1993: 1; Count: [s] 23o;144f;2043g;9628s;2127ss; ‡1f;21g;74s;12ss
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
  Ref: B.L. Monroe Jr. & C.G. Sibley, 1993: 1; Count: [s] 23o;144f;2043g;9628s;2127ss; ‡1f;21g;74s;12ss
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
    Ref: B.L. Monroe Jr. & C.G. Sibley, 1993: 3; Count: [s] 21o;139f;2029g;9571s;2115ss; ‡1f;21g;74s;12ss
       Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988
      Ref: B.L. Monroe Jr. & C.G. Sibley, 1993: 43; Count: [s] 10o;106f;1787g;8445s;1871ss; ‡1f;18g;69s;9ss
         Superorder Apodimorphae see Order Apodiformes Peters, 1940
        Ref: B.L. Monroe Jr. & C.G. Sibley, 1993: 60; Count: [s] 2o;3f;127g;424s;113ss; ‡1s
           Order Trochiliformes Wagler - hummingbirds see Suborder Apodi Peters, 1940
          Ref: B.L. Monroe Jr. & C.G. Sibley, 1993: 63; Count: [s] 1f;108g;321s;92ss; ‡1s
             Family Trochilidae Vigors, 1825 - hummingbirds
            Ref: B.L. Monroe Jr. & C.G. Sibley, 1993: 63; Count: -
               Subfamily Trochilinae Jardine, 1833 - typical hummingbirds
              Ref: B.L. Monroe Jr. & C.G. Sibley, 1993: 64; Count: [s] 104g;292s;77ss; ‡1s
                 Genus Aglaiocercus J.T. Zimmer, 1930
                Ref: B.L. Monroe Jr. & C.G. Sibley, 1993: 73; Count: [s] 2s;3ss
                   Aglaiocercus kingi (Lesson, 1832) - long-tailed sylph
                  Ref: B.L. Monroe Jr. & C.G. Sibley, 1993: 73; Count: 3ss
                     Aglaiocercus kingi berlepschi - Venezuelan sylph
                    Ref: B.L. Monroe Jr. & C.G. Sibley, 1993: 73; Count: -