Phylum Chordata Bateson, 1885 - chordates
   Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
     Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
       Superorder Neognathae Pycraft, 1900 see Cohort Neognathae Pycraft, 1900
         Order Psittaciformes Wagler, 1830 - parrots
           Family Psittacidae Illiger, 1811 - cockatoos and parrots
             Subfamily Psittacinae Illiger, 1811 - typical parrots
               Genus Psittacula Cuvier, 1800
                 Psittacula alexandri (Linnaeus, 1758) - red-breasted parakeet
                 Psittacula calthorpae (Blyth, 1849)
                 Psittacula caniceps (Blyth, 1846) - Nicobar parakeet
                 Psittacula columboides (Vigors, 1830) - Malabar parakeet
                 Psittacula cyanocephala (Linnaeus, 1766) - plum-headed parakeet
                 Psittacula derbiana (Fraser, 1852) - Derbyan parakeet
                 Psittacula eques (Boddaert, 1783)
                 Psittacula eupatria (Linnaeus, 1766) - Alexandrine parakeet
                 Psittacula himalayana (Lesson, 1831) - slaty-headed parakeet
                 Psittacula intermedia (Rothschild, 1895) - intermediate parakeet
                 Psittacula krameri (Scopoli, 1769) - rose-ringed parakeet
                 Psittacula longicauda (Boddaert, 1783) - long-tailed parakeet
                 Psittacula roseata Biswas, 1951 - blossom-headed parakeet
                 †Psittacula wardi (Newton, 1867) - Seychelles parakeet