Egg of <a href="https://en.wikipedia.org/wiki/Hydroprogne_caspia" class="extiw" title="w:Hydroprogne caspia">Caspian tern</a> collection of Jacques Perrin de Brichambaut.
<div class="fn value">
<a href="//commons.wikimedia.org/wiki/User:Erc%C3%A9" title="User:Ercé">Roger Culos</a></div>
<span class="int-own-work" lang="en">Own work</span>