user3971: I was going through some of the questions after answering this question, and I was noticing a lot of questions deal with pigments and pigmentation.  Searching for color will bring up plenty, but some other recent ones include:
Why ducklings are yellow?
Is there any natural blue rose?
Should the tag be pigments or pigmentation?  Do people think this would be a good tag?

user948: I've edited the questions you linked and added a pigmentation tag to them. I chose that over "pigments" as the process of pigmentation is biological, while the word pigments seems to suggest the chemistry of pigment molecules. If you want to do a larger search and retag other questions, feel free.
BTW, since you have greater than 150 reputation, you can create tags yourself. However, I applaud you for asking here first.

3971: <p>I was going through some of the questions after answering <a href="https://biology.stackexchange.com/questions/10041/why-are-the-colours-our-eyes-can-be-limited">this question</a>, and I was noticing a lot of questions deal with pigments and pigmentation.  Searching for color will bring up plenty, but some other recent ones include:</p>

<p><a href="https://biology.stackexchange.com/questions/10008/why-ducklings-are-yellow">Why ducklings are yellow?</a></p>

<p><a href="https://biology.stackexchange.com/questions/10026/is-there-any-natural-blue-rose">Is there any natural blue rose?</a></p>

<p>Should the tag be pigments or pigmentation?  Do people think this would be a good tag?</p>
 948: <p>I've edited the questions you linked and added a <a href="https://biology.stackexchange.com/questions/tagged/pigmentation" class="post-tag" title="show questions tagged &#39;pigmentation&#39;" rel="tag">pigmentation</a> tag to them. I chose that over "pigments" as the process of pigmentation is biological, while the word pigments seems to suggest the chemistry of pigment molecules. If you want to do a larger search and retag other questions, feel free.</p>

<p>BTW, since you have greater than 150 reputation, you can <a href="https://biology.stackexchange.com/help/privileges/create-tags">create tags</a> yourself. However, I applaud you for asking here first.</p>
