"saddleback caterpillar" meaning in English

{
  "forms": [
    {
      "form": "saddleback caterpillars",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "saddleback caterpillar (plural saddleback caterpillars)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
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        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Zygaenoid moths",
          "orig": "en:Zygaenoid moths",
          "parents": [
            "Moths",
            "Insects",
            "Arthropods",
            "Animals",
            "Lifeforms",
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            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A caterpillar - the larva of a moth native to the eastern U.S., Sibine stimulea - which usually has a green and brown saddle-shaped mark on its back."
      ],
      "id": "en-saddleback_caterpillar-en-noun-euhhmGS-",
      "links": [
        [
          "caterpillar",
          "caterpillar"
        ],
        [
          "larva",
          "larva"
        ],
        [
          "U.S.",
          "U.S."
        ],
        [
          "saddle",
          "saddle"
        ],
        [
          "mark",
          "mark"
        ]
      ],
      "wikipedia": [
        "saddleback caterpillar"
      ]
    }
  ],
  "word": "saddleback caterpillar"
}

{
  "forms": [
    {
      "form": "saddleback caterpillars",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "saddleback caterpillar (plural saddleback caterpillars)",
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        "English countable nouns",
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        "English terms with non-redundant non-automated sortkeys",
        "Entries using missing taxonomic name (species)",
        "en:Zygaenoid moths"
      ],
      "glosses": [
        "A caterpillar - the larva of a moth native to the eastern U.S., Sibine stimulea - which usually has a green and brown saddle-shaped mark on its back."
      ],
      "links": [
        [
          "caterpillar",
          "caterpillar"
        ],
        [
          "larva",
          "larva"
        ],
        [
          "U.S.",
          "U.S."
        ],
        [
          "saddle",
          "saddle"
        ],
        [
          "mark",
          "mark"
        ]
      ],
      "wikipedia": [
        "saddleback caterpillar"
      ]
    }
  ],
  "word": "saddleback caterpillar"
}