Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
               Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
                 Order Apodiformes Peters, 1940 - swifts
                   Family Apodidae Hartert, 1897 - swifts
                     Subfamily Apodinae Hartert, 1897 - true swifts
                       Genus Apus Scopoli, 1777 - house swift
                         Apus apus (C. Linnaeus, 1758) - common swift
                           1 Apus apus apusᵀ (Linnaeus, 1758)
                           2 Apus apus pekinensis (Swinhoe, 1870)