Here are a few options for a WordPress post_tag description, using traditional Chinese, with varying levels of detail:

**Option 1 (Concise):**

> 探索關於鳥類的獨特之處。包括牠們的解剖結構、行為和習性。

**(Translation: Explore the unique aspects of birds. Including their anatomy, behavior, and habits.)**

**Option 2 (More Informative):**

> 深入了解鳥類世界，探索牠們的各種特徵。從羽毛的顏色和結構，到飛行的方式、鳴叫聲和遷徙模式，全面認識鳥類的奧秘。

**(Translation: Delve into the world of birds and explore their various characteristics. From the color and structure of their feathers, to the way they fly, their calls, and migration patterns, gain a comprehensive understanding of the mysteries of birds.)**

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

> 此標籤涵蓋鳥類特徵，幫助你辨識不同種類。觀察牠們的嘴喙、腳爪、翅膀，以及牠們的棲息地，學習如何區分不同鳥類的特徵。

**(Translation: This tag covers bird characteristics to help you identify different species. Observe their beaks, claws, wings, and their habitats, and learn how to distinguish the characteristics of different birds.)**

**Option 4 (More General):**

> 鳥類特徵相關文章，探索所有關於鳥類的內容，包括牠們的身體構造、生活方式、食物等等。

**(Translation: Articles related to bird characteristics, exploring everything about birds, including their body structure, lifestyle, food, etc.)**

**Which option you choose depends on:**

* **The main focus of the posts using this tag:** Are you primarily discussing identification, general biology, or something else?
* **How descriptive you want the tag to be:** Do you want a short and sweet description, or something more detailed?
* **Search Engine Optimization (SEO):** Choose keywords that people might search for, such as “鳥類辨識 (bird identification)” if that’s a key focus.

Remember to choose the option that best represents the content you are tagging! It’s also a good idea to keep the description concise and informative.