Here are a few options for a WordPress post_tag description, catering to slightly different focuses:

**Option 1: Concise and Descriptive**

* **Title:** 小鳥喝水 (xiǎo niǎo hē shuǐ)
* **Description:** 描述小鳥們喝水的照片、影片或文章。包含啾啾聲、可愛鳥類的日常、及水的重要性。 (Describes photos, videos, or articles about birds drinking water. Includes chirping sounds, the daily life of cute birds, and the importance of water.)

**Option 2: Focus on Content Variety**

* **Title:** 小鳥喝水 (xiǎo niǎo hē shuǐ)
* **Description:** 分享關於小鳥喝水的文章，涵蓋各種鳥類、喝水的方式、以及水在鳥類生活中的角色。歡迎觀賞精彩攝影作品與影片！ (Share articles about birds drinking water, covering various bird species, how they drink water, and the role of water in their lives. Welcome to view stunning photography and videos!)

**Option 3: Emphasizing Observation and Natural Beauty**

* **Title:** 小鳥喝水 (xiǎo niǎo hē shuǐ)
* **Description:** 捕捉小鳥喝水的瞬間: 一窺自然之美，感受生命的活力與寧靜。 觀看小鳥們在清澈的水邊展現的优雅姿态。 (Capturing the moment of birds drinking water: a glimpse into the beauty of nature, feeling the vitality and tranquility of life. Watch birds show their elegant poses by clear water.)

**Option 4: Simple and Direct**

* **Title:** 小鳥喝水 (xiǎo niǎo hē shuǐ)
* **Description:** 此標籤用於標記關於小鳥喝水的內容。(This tag is used to mark content about birds drinking water.)

**Key considerations when choosing:**

* **Target Audience:** Who are you writing for? Consider their level of understanding of Chinese.
* **Content Focus:** What is the main type of content you’ll be tagging with this tag?
* **Word Count:** WordPress descriptions can be a few sentences long.
* **SEO:** Include relevant keywords (e.g., “小鳥” (bird), “喝水” (drinking water)) to help with search engine optimization, but make sure it reads naturally.

I’d recommend Option 1 or 2 as a starting point as they provide a nice balance of description and potential content ideas for the tag. Adjust the wording as needed to tailor it to your specific content and audience. Remember to enter the description in the “Description” field when adding the tag in your WordPress dashboard.