Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988
         Superorder Psittacimorphae Huxley, 1867
           Order Psittaciformes Wagler, 1830 - parrots
             Family Psittacidae Illiger, 1811 - cockatoos and parrots
               Genus Psittacula Cuvier, 1800
                 01 Psittacula eupatria (Linnaeus, 1766) - Alexandrine parakeet
                 02 ‡Psittacula wardi (Newton, 1867) - Seychelles parakeet
                 03 Psittacula krameri (Scopoli, 1769) - rose-ringed parakeet
                 04 Psittacula echo (Newton & Newton, 1876) - Mauritius parakeet
                 05 ‡Psittacula exsul (Newton, 1872) - Newton's parakeet
                 06 Psittacula himalayana (Lesson, 1831) - slaty-headed parakeet
                 07 Psittacula finschii (Hume, 1874) - grey-headed parakeet
                 08 Psittacula intermedia (Rothschild, 1895) - intermediate parakeet
                 09 Psittacula cyanocephala (Linnaeus, 1766) - plum-headed parakeet
                 10 Psittacula roseata Biswas, 1951 - blossom-headed parakeet
                 11 Psittacula columboides (Vigors, 1830) - Malabar parakeet
                 12 Psittacula calthropae (Blyth, 1849) - Layard's parakeet see Psittacula calthorpae (Blyth, 1849)
                 13 Psittacula derbiana (Fraser, 1852) - Derbyan parakeet
                 14 Psittacula alexandri (Linnaeus, 1758) - red-breasted parakeet
                 15 Psittacula caniceps (Blyth, 1846) - Nicobar parakeet
                 16 Psittacula longicauda (Boddaert, 1783) - long-tailed parakeet