* As a common noun: No, you would not capitalize "lion" if it's referring to the animal in general.
* Example: "The lion is the king of the jungle."
* As a proper noun: Yes, you would capitalize "Lion" if it's part of a specific name or title.
* Example: "The Lion King is a popular Disney movie."
* Example: "The Lion, the Witch and the Wardrobe is a classic novel."
Let me know if you have any other examples in mind!