"cigno nero" meaning in Italian

{
  "forms": [
    {
      "form": "cigni neri",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "cigno nero m (plural cigni neri)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "it",
          "name": "Birds",
          "orig": "it:Birds",
          "parents": [
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "black swan (Cygnus atratus)"
      ],
      "id": "en-cigno_nero-it-noun-0t4IS8dw",
      "links": [
        [
          "black swan",
          "black swan"
        ],
        [
          "Cygnus atratus",
          "Cygnus atratus#Translingual"
        ]
      ],
      "related": [
        {
          "word": "cigno canoro"
        },
        {
          "word": "cigno coscoroba"
        },
        {
          "word": "cigno dal collo nero"
        },
        {
          "word": "cigno musico"
        },
        {
          "word": "cigno muto"
        },
        {
          "word": "cigno reale"
        },
        {
          "word": "cigno selvatico"
        },
        {
          "word": "cigno trombettiere"
        }
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "cigno nero"
}

{
  "forms": [
    {
      "form": "cigni neri",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "cigno nero m (plural cigni neri)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "related": [
    {
      "word": "cigno canoro"
    },
    {
      "word": "cigno coscoroba"
    },
    {
      "word": "cigno dal collo nero"
    },
    {
      "word": "cigno musico"
    },
    {
      "word": "cigno muto"
    },
    {
      "word": "cigno reale"
    },
    {
      "word": "cigno selvatico"
    },
    {
      "word": "cigno trombettiere"
    }
  ],
  "senses": [
    {
      "categories": [
        "Italian countable nouns",
        "Italian entries with incorrect language header",
        "Italian lemmas",
        "Italian masculine nouns",
        "Italian multiword terms",
        "Italian nouns",
        "it:Birds"
      ],
      "glosses": [
        "black swan (Cygnus atratus)"
      ],
      "links": [
        [
          "black swan",
          "black swan"
        ],
        [
          "Cygnus atratus",
          "Cygnus atratus#Translingual"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "cigno nero"
}