"contact call" meaning in English

{
  "forms": [
    {
      "form": "contact calls",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "contact call (plural contact calls)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English alliterative compounds",
          "parents": [
            "Alliterative compounds",
            "Alliterative phrases",
            "Compound terms",
            "Phrases",
            "Terms by etymology",
            "Lemmas",
            "Multiword terms"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Ornithology",
          "orig": "en:Ornithology",
          "parents": [
            "Zoology",
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A call made between birds in a flock or a pair in order to maintain contact with one another when foraging, flying, etc."
      ],
      "id": "en-contact_call-en-noun-kOOd6Jqs",
      "links": [
        [
          "ornithology",
          "ornithology"
        ],
        [
          "call",
          "call"
        ]
      ],
      "raw_glosses": [
        "(ornithology) A call made between birds in a flock or a pair in order to maintain contact with one another when foraging, flying, etc."
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "ornithology"
      ]
    }
  ],
  "word": "contact call"
}

{
  "forms": [
    {
      "form": "contact calls",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "contact call (plural contact calls)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English alliterative compounds",
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "en:Ornithology"
      ],
      "glosses": [
        "A call made between birds in a flock or a pair in order to maintain contact with one another when foraging, flying, etc."
      ],
      "links": [
        [
          "ornithology",
          "ornithology"
        ],
        [
          "call",
          "call"
        ]
      ],
      "raw_glosses": [
        "(ornithology) A call made between birds in a flock or a pair in order to maintain contact with one another when foraging, flying, etc."
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "ornithology"
      ]
    }
  ],
  "word": "contact call"
}