Here are a few options for the WordPress post tag description for “鳥類學” (Bird Biology/Ornithology) in Traditional Chinese, ranging from concise to more detailed:

**Option 1 (Concise):**

> 研究鳥類生命科學的學科。
> (Studies the life sciences of birds.)

**Option 2 (Slightly more descriptive):**

> 探索鳥類生理、生態、行為、演化等各方面的科學。
> (The science exploring the physiology, ecology, behavior, and evolution of birds.)

**Option 3 (Focus on scope):**

> 包括鳥類解剖學、分類學、行為學、生態學等分支領域的學科。
> (The discipline encompassing branches such as bird anatomy, taxonomy, ethology, and ecology.)

**Option 4 (Targeting content creators):**

> 標籤應用於關於鳥類研究、觀測、攝影、保育、及其他相關文章。
> (Tag for use in articles about bird research, observation, photography, conservation, and other related topics.)

**Option 5 (Adding a sense of wonder):**

> 揭示天空精靈奧秘的科學，包括牠們的形態、生活習性與演化歷程。
> (The science unveiling the mysteries of the sky’s sprites, including their form, habits, and evolutionary journeys.)

**Which to choose depends on your website’s focus:**

* **If your website is a general science blog or about nature:** Option 2 or 3 are good.
* **If your website focuses on birds or conservation:** Option 4 or 5 are perfect.
* **If your main purpose is SEO and content organization:** Option 1 is effective and concise.

Remember to choose the option that best fits your overall website tone and the specific types of content you’ll be publishing!