"crested duck" meaning in English

{
  "forms": [
    {
      "form": "crested ducks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "crested duck (plural crested ducks)",
      "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": [
            "Entries with incorrect language header",
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          "source": "w"
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          "source": "w"
        },
        {
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          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Ducks",
          "orig": "en:Ducks",
          "parents": [
            "Anatids",
            "Poultry",
            "Freshwater birds",
            "Birds",
            "Livestock",
            "Vertebrates",
            "Agriculture",
            "Animals",
            "Chordates",
            "Applied sciences",
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          "source": "w"
        }
      ],
      "glosses": [
        "A duck of species Lophonetta specularioides, of South America."
      ],
      "id": "en-crested_duck-en-noun-q5nd7YIv",
      "links": [
        [
          "duck",
          "duck"
        ],
        [
          "Lophonetta specularioides",
          "Lophonetta specularioides#Translingual"
        ],
        [
          "South America",
          "South America"
        ]
      ]
    }
  ],
  "word": "crested duck"
}

{
  "forms": [
    {
      "form": "crested ducks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "crested duck (plural crested ducks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
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      ],
      "glosses": [
        "A duck of species Lophonetta specularioides, of South America."
      ],
      "links": [
        [
          "duck",
          "duck"
        ],
        [
          "Lophonetta specularioides",
          "Lophonetta specularioides#Translingual"
        ],
        [
          "South America",
          "South America"
        ]
      ]
    }
  ],
  "word": "crested duck"
}