{
  "id": 571595,
  "title": "Multi-class or Multi-label task?",
  "url": "/competitions/birdclef-2025/discussion/571595",
  "author_name": "",
  "post_date": "2025-04-04T08:41:31.099900Z",
  "votes": 1,
  "comment_count": 3,
  "views": 0,
  "content": "<p>Could you clarify whether BirdCLEF+ 2025 is a multiclass or multilabel classification task? Also, is each audio file (and every 5-second segment within it) guaranteed to contain only one animal species?</p>",
  "messages": [
    {
      "id": "3170057",
      "postDate": "04/04/2025 08:41:31",
      "content": "<p>Could you clarify whether BirdCLEF+ 2025 is a multiclass or multilabel classification task? Also, is each audio file (and every 5-second segment within it) guaranteed to contain only one animal species?</p>",
      "rawMarkdown": "Could you clarify whether BirdCLEF+ 2025 is a multiclass or multilabel classification task? Also, is each audio file (and every 5-second segment within it) guaranteed to contain only one animal species?",
      "votes": null
    },
    {
      "id": "3170065",
      "postDate": "04/04/2025 08:52:35",
      "content": "<p>It's a multilabel task. 5s segments can contain no species, one species, or multiple species. Yet, not all species of the train data actually appear in the test data - the metric however reflects that and skips species with no test data occurence.</p>",
      "rawMarkdown": "It's a multilabel task. 5s segments can contain no species, one species, or multiple species. Yet, not all species of the train data actually appear in the test data - the metric however reflects that and skips species with no test data occurence.",
      "votes": null
    },
    {
      "id": "3170101",
      "postDate": "04/04/2025 10:18:33",
      "content": "<p>However, is each audio file annotated with only one species in the training data?</p>",
      "rawMarkdown": "However, is each audio file annotated with only one species in the training data?",
      "votes": null
    },
    {
      "id": "3170159",
      "postDate": "04/04/2025 11:51:00",
      "content": "<p>A good strategy before starting a competition is to read the data page:</p>\n<p><a href=\"https://www.kaggle.com/competitions/birdclef-2025/data\" target=\"_blank\">https://www.kaggle.com/competitions/birdclef-2025/data</a></p>",
      "rawMarkdown": "A good strategy before starting a competition is to read the data page:\n\n\nhttps://www.kaggle.com/competitions/birdclef-2025/data",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 3170065,
      "author_name": "stefankahl",
      "author_url": "",
      "post_date": "04/04/2025 08:52:35",
      "content": "<p>It's a multilabel task. 5s segments can contain no species, one species, or multiple species. Yet, not all species of the train data actually appear in the test data - the metric however reflects that and skips species with no test data occurence.</p>",
      "votes": null,
      "replies": [
        {
          "id": 3170101,
          "author_name": "alexandrgavrilenko",
          "author_url": "",
          "post_date": "04/04/2025 10:18:33",
          "content": "<p>However, is each audio file annotated with only one species in the training data?</p>",
          "votes": null,
          "replies": [
            {
              "id": 3170159,
              "author_name": "steubk",
              "author_url": "",
              "post_date": "04/04/2025 11:51:00",
              "content": "<p>A good strategy before starting a competition is to read the data page:</p>\n<p><a href=\"https://www.kaggle.com/competitions/birdclef-2025/data\" target=\"_blank\">https://www.kaggle.com/competitions/birdclef-2025/data</a></p>",
              "votes": null,
              "replies": []
            }
          ]
        }
      ]
    }
  ],
  "raw_markdown_by_id": {
    "3170057": "Could you clarify whether BirdCLEF+ 2025 is a multiclass or multilabel classification task? Also, is each audio file (and every 5-second segment within it) guaranteed to contain only one animal species?",
    "3170065": "It's a multilabel task. 5s segments can contain no species, one species, or multiple species. Yet, not all species of the train data actually appear in the test data - the metric however reflects that and skips species with no test data occurence.",
    "3170101": "However, is each audio file annotated with only one species in the training data?",
    "3170159": "A good strategy before starting a competition is to read the data page:\n\n\nhttps://www.kaggle.com/competitions/birdclef-2025/data"
  },
  "source": "meta"
}