"Chatham rail" meaning in English

{
  "forms": [
    {
      "form": "Chatham rails",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Chatham rail (plural Chatham rails)",
      "name": "en-noun"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Rallids",
          "orig": "en:Rallids",
          "parents": [
            "Gruiforms",
            "Freshwater birds",
            "Birds",
            "Vertebrates",
            "Chordates",
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            "All topics",
            "Life",
            "Fundamental",
            "Nature"
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          "source": "w"
        }
      ],
      "glosses": [
        "Cabalus modestus, an extinct flightless bird of the family Rallidae, endemic to the Chatham archipelago of New Zealand."
      ],
      "id": "en-Chatham_rail-en-noun-Nzle3alH",
      "wikipedia": [
        "Chatham rail"
      ]
    }
  ],
  "word": "Chatham rail"
}

{
  "forms": [
    {
      "form": "Chatham rails",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Chatham rail (plural Chatham rails)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "en:Rallids"
      ],
      "glosses": [
        "Cabalus modestus, an extinct flightless bird of the family Rallidae, endemic to the Chatham archipelago of New Zealand."
      ],
      "wikipedia": [
        "Chatham rail"
      ]
    }
  ],
  "word": "Chatham rail"
}