Here are a few options for a WordPress post_tag description, keeping in mind the goal is to provide context and help users understand what this post tag represents:

**Option 1 (Concise & Direct):**

> 標籤：白頭翁離巢。 紀錄有關白頭翁雛鳥離巢或遷徙的資訊。

**Translation & Explanation:**

* **Translation:** Tag: White-headed Bulbul fledging. Records information related to the fledging or migration of baby White-headed Bulbuls.
* **Explanation:** This is a straightforward and clear description. It immediately defines the subject of the tag and explains the content it categorizes.

**Option 2 (Slightly More Descriptive):**

> 標籤：白頭翁離巢。 收錄有關白頭翁雛鳥離開鳥巢，開始獨立生活，或是展開遷徙旅程的相關報導、照片和影片。

**Translation & Explanation:**

* **Translation:** Tag: White-headed Bulbul fledging. Includes reports, photos, and videos related to baby White-headed Bulbuls leaving the nest and beginning independent life, or embarking on a migratory journey.
* **Explanation:** This adds a bit more detail, highlighting the content formats that might be associated with this tag (reports, photos, videos).

**Option 3 (Focus on Observation & Passion):**

> 標籤：白頭翁離巢。 追蹤白頭翁雛鳥學飛、離巢的精彩瞬間，以及牠們展翅高飛、探索世界的歷程分享。 觀鳥愛好者必看！

**Translation & Explanation:**

* **Translation:** Tag: White-headed Bulbul fledging. Tracks the wonderful moments of baby White-headed Bulbuls learning to fly and fledging, as well as sharing their journey of spreading their wings and exploring the world. A must-see for birdwatching enthusiasts!
* **Explanation:** This option uses more emotionally engaging language, suggesting a sense of excitement and the beauty of the observation. It also caters specifically to an audience of birdwatching enthusiasts.

**How to Choose:**

* **Your Target Audience:** Consider who your website visitors are. Are they casual readers or dedicated birders?
* **Website’s Tone:** Does your website have a very formal or a more relaxed and enthusiastic tone?
* **Content Scope:** What kind of white-headed bulbul content do you have on your website?

**To Implement:**

1. **Access Your WordPress Admin:** Go to your WordPress admin dashboard (usually `yourwebsite.com/wp-admin`).
2. **Navigate to Tags:** Go to “Posts” -> “Tags”.
3. **Find the Tag:** Locate the tag “白頭翁離巢”. You may need to search or create it first.
4. **Edit the Tag:** Click on the tag to edit it.
5. **Enter the Description:** In the “Description” field, paste your chosen description from one of the options above.
6. **Update the Tag:** Click the “Update” or “Save” button to save your changes.

Good luck and happy blogging!