"black-necked swan" meaning in English

{
  "forms": [
    {
      "form": "black-necked swans",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "black-necked swan (plural black-necked swans)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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        },
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          "name": "Terms with Russian translations",
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          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Swans",
          "orig": "en:Swans",
          "parents": [
            "Anatids",
            "Freshwater birds",
            "Birds",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The only South American species of swan, Cygnus melancoryphus."
      ],
      "id": "en-black-necked_swan-en-noun-59nsZGom",
      "links": [
        [
          "swan",
          "swan"
        ],
        [
          "Cygnus melancoryphus",
          "Cygnus melancoryphus#Translingual"
        ]
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "South American swan",
          "word": "mustakaulajoutsen"
        },
        {
          "code": "nv",
          "lang": "Navajo",
          "sense": "South American swan",
          "word": "dééłgai bitsiiʼ halzhinígíí"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "černošéjnyj lébedʹ",
          "sense": "South American swan",
          "tags": [
            "masculine"
          ],
          "word": "черноше́йный ле́бедь"
        }
      ],
      "wikipedia": [
        "black-necked swan"
      ]
    }
  ],
  "word": "black-necked swan"
}

{
  "forms": [
    {
      "form": "black-necked swans",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
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      "expansion": "black-necked swan (plural black-necked swans)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "The only South American species of swan, Cygnus melancoryphus."
      ],
      "links": [
        [
          "swan",
          "swan"
        ],
        [
          "Cygnus melancoryphus",
          "Cygnus melancoryphus#Translingual"
        ]
      ],
      "wikipedia": [
        "black-necked swan"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "South American swan",
      "word": "mustakaulajoutsen"
    },
    {
      "code": "nv",
      "lang": "Navajo",
      "sense": "South American swan",
      "word": "dééłgai bitsiiʼ halzhinígíí"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "černošéjnyj lébedʹ",
      "sense": "South American swan",
      "tags": [
        "masculine"
      ],
      "word": "черноше́йный ле́бедь"
    }
  ],
  "word": "black-necked swan"
}