Parvclass Ratitae 平胸小纲
  Order Lithornithiformes 石板鸟目
    Family Lithornithidae 石板鸟科

  Order Palaeocursornithiformes
    Family Cursornithidae

  Order Dinornithiformes - moas 恐鸟目
    Family Dinornithidae - dinornithid moas 恐鸟科
      Genus Dinornis  恐鸟属
        Dinornis giganteus - Giant Moa 伟恐鸟
        Dinornis maximus 最大恐鸟
        Dinornis novaezealandiae - Large Bush Moa 摩亚恐鸟（新西兰恐鸟）
        Dinornis struthoides - Slender Bush Moa 丛恐鸟
    Family Emeidae - emeid moas
      Genus Anomalopteryx 巨恐鸟属
        Anomalopteryx didiformis 巨恐鸟
      Genus Emeus  巨鸸鹋属
        Emeus crassus - Eastern Moa东部巨鸸鹋
      Genus Euryapteryx
        Euryapteryx curtus - Coastal Moa 海岸恐鸟
        Euryapteryx geranoides - Stout-legged Moa硕腿恐鸟
        Euryapteryx gravis - Greater Broad-billed Moa 大阔嘴恐鸟
      Genus Megalapteryx 巨恐鸟属
        Megalapteryx didinus - Upland Moa 高地恐鸟
        Megalapteryx hectori
      Genus Pachyornis
        Pachyornis australis  澳洲象鸟
        Pachyornis elephantopus - Heavy-footed Moa 重足象鸟
        Pachyornis mappini - Mappin’s Moa麦氏象鸟

  Order Struthioniformes 鸵形目
    Suborder Struthioni 鸵亚目
      Infraorder Struthionides  鸵下目
        Family Eleutherornithidae
        Family Palaeotididae
        Family Struthionidae - ostriches 鸵科
          Genus Struthio 鸵属
            Struthio camelus - ostrich 鸵鸟
              Struthio camelus australis 南部鸵鸟
              Struthio camelus massaicus 北非鸵鸟
              Struthio camelus syriacus - Arabian ostrich 阿拉伯鸵鸟
              Struthio camelus camelus - African ostrich 非洲鸵鸟
              Struthio camelus molybdophanes - Somali ostrich 索马里鸵鸟

      Infraorder Rheides 美洲鸵下目
        Family Opisthodactylidae
        Family Rheidae - rheas 美洲鸵科
          Genus Rhea 美洲鸵属
            Rhea americana - greater rhea 美洲鸵
              Rhea americana albescens
              Rhea americana americana
              Rhea americana araneipes
              Rhea americana intermedia
              Rhea americana nobilis
            Rhea pennata - lesser rhea 美洲小鸵
              Rhea pennata garleppi
              Rhea pennata tarapacensis - Puna rhea
              Rhea pennata pennata - Darwin's rhea
    Suborder Casuarii 鹤鸵亚目
      Family Dromornithidae - mihirungs 雷啸鸟科
        Genus Dromornis  雷啸鸟属
          Dromornis stirtoni 雷啸鸟
        Genus Genyornis 巨鸟属
          Genyornis newtoni  牛顿巨鸟
      Family Casuariidae  - cassowaries 鹤鸵科
        Tribe Casuariini  - cassowaries 鹤鸵族
          Genus Casuarius  鹤鸵属
            Casuarius lydekki
            Casuarius casuarius - southern cassowary 鹤鸵
              Casuarius casuarius aruensis
              Casuarius casuarius bicarunculatus
              Casuarius casuarius bistriatus
              Casuarius casuarius casuarius
              Casuarius casuarius johnsonii
              Casuarius casuarius lateralis
              Casuarius casuarius sclaterii
              Casuarius casuarius tricarunculatus
            Casuarius bennetti  - dwarf cassowary 倭鹤鸵
              Casuarius bennetti bennetti 
              Casuarius bennetti claudii
              Casuarius bennetti goodfellowi
              Casuarius bennetti hecki
              Casuarius bennetti papuanus
              Casuarius bennetti picticollis
              Casuarius bennetti shawmayeri
            Casuarius unappendiculatus - northern cassowary 单垂鹤鸵
              Casuarius unappendiculatus aurantiacus
              Casuarius unappendiculatus occipitalis
              Casuarius unappendiculatus philipi
              Casuarius unappendiculatus unappendiculatus
        Tribe Dromaiini - emus 鸸鹋族
          Genus Dromaius 鸸鹋属
            Dromaius minor - King Island emu 小王岛鸸鹋
            Dromaius novaehollandiae - emu 鸸鹋
              Dromaius novaehollandiae novaehollandiae
              Dromaius novaehollandiae diemenensis
            Dromaius ater - King Island emu 王岛鸸鹋
            Dromaius baudinianus - Kangaroo Island emu 袋鼠岛鸸鹋
      Family Apterygidae - kiwis 无翼鸟科
        Genus Apteryx  无翼鸟属
          Apteryx australis  - brown kiwi 褐几维
            Apteryx australis mantelli
            Apteryx australis australis 
            Apteryx australis lawryi
          Apteryx owenii - little spotted kiwi 小斑几维
          Apteryx haastii - great spotted kiwi 大斑几维

   Order Aepyornithiformes 隆鸟目
      Genus Stromeria
      Family Aepyornithidae" - elephantbirds 隆鸟科
        Genus Aepyornis"  隆鸟属
          Aepyornis gracilis
          Aepyornis hildebrandti
          Aepyornis maximus  隆鸟
          Aepyornis medius 小隆鸟
          Aepyornis titan 泰坦鸟
        Genus Mullerornis
          Mullerornis agilis
          Mullerornis betsilei
          Mullerornis rudis