{
  "id": 582443,
  "title": "Why does adding rare class data lower the LB score?",
  "url": "/competitions/birdclef-2025/discussion/582443",
  "author_name": "Naoki Nomurrr",
  "post_date": "2025-05-31T09:11:29.860000",
  "votes": 1,
  "comment_count": 0,
  "views": 0,
  "content": "<p>When I added rare class data  to my training set, the LB score dropped from 0.822 to 0.795.<br>\n<a href=\"https://www.kaggle.com/competitions/birdclef-2025/discussion/570760\" target=\"_blank\">https://www.kaggle.com/competitions/birdclef-2025/discussion/570760</a><br>\nI then found this interesting discussion<br>\n<a href=\"https://www.kaggle.com/competitions/birdclef-2025/discussion/570837\" target=\"_blank\">https://www.kaggle.com/competitions/birdclef-2025/discussion/570837</a><br>\nDo you think it’s safe to assume that these rare classes are not included in the species evaluated on the LB?</p>",
  "messages": [
    {
      "id": 3214315,
      "postDate": "2025-05-31T09:11:29.860Z",
      "content": "<p>When I added rare class data  to my training set, the LB score dropped from 0.822 to 0.795.<br>\n<a href=\"https://www.kaggle.com/competitions/birdclef-2025/discussion/570760\" target=\"_blank\">https://www.kaggle.com/competitions/birdclef-2025/discussion/570760</a><br>\nI then found this interesting discussion<br>\n<a href=\"https://www.kaggle.com/competitions/birdclef-2025/discussion/570837\" target=\"_blank\">https://www.kaggle.com/competitions/birdclef-2025/discussion/570837</a><br>\nDo you think it’s safe to assume that these rare classes are not included in the species evaluated on the LB?</p>",
      "rawMarkdown": "When I added rare class data  to my training set, the LB score dropped from 0.822 to 0.795.\nhttps://www.kaggle.com/competitions/birdclef-2025/discussion/570760\nI then found this interesting discussion\nhttps://www.kaggle.com/competitions/birdclef-2025/discussion/570837\nDo you think it’s safe to assume that these rare classes are not included in the species evaluated on the LB?",
      "votes": 1
    }
  ],
  "comments": [],
  "raw_markdown_by_id": {
    "3214315": "When I added rare class data  to my training set, the LB score dropped from 0.822 to 0.795.\nhttps://www.kaggle.com/competitions/birdclef-2025/discussion/570760\nI then found this interesting discussion\nhttps://www.kaggle.com/competitions/birdclef-2025/discussion/570837\nDo you think it’s safe to assume that these rare classes are not included in the species evaluated on the LB?"
  }
}