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 [Psittaciformes] Wagler, 1830 [monotypic] - parrots
         Family Psittacidae Illiger, 1811 - cockatoos and parrots
           Subfamily Psittacinae Illiger, 1811 - typical parrots
             Tribe Arini Gray, 1840
               Genus Pionus Wagler, 1832
                 Pionus menstruus (Linnaeus, 1766) - blue-headed parrot
                   1 Pionus menstruus rubrigularis Cabanis, 1881
                   2 Pionus menstruus menstruus (Linnaeus, 1766)
                   3 Pionus menstruus reichenowi Heine, 1884