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Organism
  Animalia
      Chordata
        Vertebrata
          Amniota
            Aves
                    Charadriiformes
                            Laridae
                                     Anous
                                             Anous stolidus
                                     Chroicocephalus
                                             Chroicocephalus cirrocephalus
                                             Chroicocephalus serranus
                                     Creagrus
                                             Creagrus furcatus
                                     Gelochelidon
                                             Gelochelidon nilotica
                                     Larus
                                             Larus modestus
                                     Leucophaeus
                                             Leucophaeus atricilla
                                             Leucophaeus modestus
                                                   [Larus modestus]
                                             Leucophaeus pipixcan
                                     Onychoprion
                                             Onychoprion anaethetus
                                     Sterna
                                             Sterna hirundo
                                     Thalasseus
                                             Thalasseus elegans
                                             Thalasseus maximus
                                             Thalasseus sandvicensis