Here are a few options for a WordPress post tag description in Traditional Chinese, aimed at covering different aspects of “鳥類生理”:

**Option 1: Broad & Informative**

* **Title:** 鳥類生理
* **Description:** 涵蓋鳥類身體結構、生理機能、繁殖、行為等方面的研究，深入探討鳥類的呼吸、消化、循環、神經系統等多個方面，以及環境對鳥類生理的影響。 (This covers their body structure, bodily functions, reproduction, and behavior. It delves into their respiratory, digestive, circulatory, and nervous systems, as well as the environmental impact.)

**Option 2: Focus on a Specific Area (e.g., Biology/Ecology)**

* **Title:** 鳥類生理
* **Description:** 探索鳥類內部的奧秘，包括其各種生理機制和生態適應。詳細研究鳥類獨特的生理特徵，以及它們如何在複雜的環境中生存。 (Explore the inner mysteries of birds, including their various physiological mechanisms and ecological adaptations. Detailed study of their unique physiological features, and how they survive in complex environments.)

**Option 3: Simple & Concise**

* **Title:** 鳥類生理
* **Description:** 關於鳥類身體機能、構造及其生態學的知識。 (Knowledge about the bodily functions and structure of birds, and their ecology.)

**Option 4: Emphasis on Research & Studies**

* **Title:** 鳥類生理
* **Description:** 解讀關於鳥類生理的研究與發現，包括最新的科學研究、論文摘要，以及對鳥類身體各方面的深入分析。 (To interpret research and findings on bird physiology, including the latest scientific studies, abstracts, and in-depth analysis of various aspects of their bodies.)

**When choosing the best option consider:**

* **Audience:** Who are you writing for (experts, general public, students)?
* **Content of your blog:** Are your posts very technical, or more general?
* **Search Engine Optimization (SEO):** Choose a description that is specific and relevant to the content you are tagging.

I would recommend Option 1 as a good general starting point. Remember to use keywords consistently! Good luck.