Phylum Chordata Bateson, 1885 - chordates
Ref: C.M. Perrins, 1991 (1990): 19 [out of scope]; Count: -
   Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
  Ref: C.M. Perrins, 1991 (1990): 19; Count: -
     Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
    Ref: C.M. Perrins, 1991 (1990): 19; Count: -
       Superorder Neognathae Pycraft, 1900 see Cohort Neognathae Pycraft, 1900
      Ref: C.M. Perrins, 1991 (1990): 19; Count: -
         Order Apodiformes Peters, 1940 - swifts
        Ref: C.M. Perrins, 1991 (1990): 21, 380; Count: -
           Family Apodidae Hartert, 1897 - swifts
          Ref: C.M. Perrins, 1991 (1990): 380; Count: -
             Subfamily Apodinae Hartert, 1897 - true swifts
            Ref: C.M. Perrins, 1991 (1990): 380; Count: -