The bottom-side of a <a href="https://en.wikipedia.org/wiki/en:Plume_moth" class="extiw" title="wikipedia:en:Plume moth">plume moth</a> (behind glas).
<a href="//commons.wikimedia.org/wiki/User:WikiMichi" title="User:WikiMichi">Michael Bemmerl</a>
CC BY 3.0 de
<span class="int-own-work" lang="en">Own work</span>