A stack of <i>Furnarius rufus</i> mud nests on a back gate of the Pinheirão stadium complex.
<a href="//commons.wikimedia.org/wiki/User:YuriNikolai" title="User:YuriNikolai">YuriNikolai</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>