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 Columbiformes Latham, 1790 - pigeons and allies
           Family Columbidae Illiger, 1811 - doves, pigeons
             Genus Caloenas Gray, 1840
               Caloenas nicobarica (Linnaeus, 1758) - Nicobar pigeon