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] Ciconiiformes Bonaparte, 1854
         Family Threskiornithidae Richmond, 1917 - ibises and spoonbills
           Subfamily Threskiornithinae Richmond, 1917 see Family Threskiornithidae Richmond, 1917
             Genus Bostrychia Reichenbach, 1853
               Bostrychia olivacea (Du Bus, 1838) - olive ibis
                 1 Bostrychia olivacea olivacea (Du Bus, 1838) - olive ibis
                 2 Bostrychia olivacea cupreipennis (Reichenow, 1903)
                 3 ‡?Bostrychia olivacea rothschildi (Bannerman, 1919) - Principe ibis
                 4 Bostrychia olivacea bocagei (Chapin, 1923) - Sao Tome ibis
                 5 Bostrychia olivacea akleyorum (Chapman, 1912)