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Organism
  Animalia
      Chordata
            Aves
                    Charadriiformes
                            Laridae
                                     Anous
                                             Anous minutus
                                             Anous stolidus
                                     Chlidonias
                                             Chlidonias leucopterus
                                             Chlidonias niger
                                     Chroicocephalus
                                             Chroicocephalus ridibundus
                                     Hydrocoloeus
                                             Hydrocoloeus minutus
                                     Hydroprogne
                                             Hydroprogne caspia
                                     Ichthyaetus
                                             Ichthyaetus audouinii
                                     Larus
                                             Larus dominicanus
                                             Larus fuscus
                                     Onychoprion
                                             Onychoprion anaethetus
                                     Rynchops
                                             Rynchops flavirostris
                                     Sterna
                                             Sterna hirundo
                                             Sterna paradisaea
                                     Sternula
                                             Sternula albifrons
                                             Sternula balaenarum
                                     Thalasseus
                                             Thalasseus maximus
                                                   [Sterna maxima]
                                               Thalasseus maximus albididorsalis
                                             Thalasseus sandvicensis