Male Pool frog (<i>Rana lessonae</i> aka <i>Pelophylax lessonae</i>) croacking. The bellows are pure white.
<a href="//commons.wikimedia.org/w/index.php?title=User:Viridiflavus&amp;action=edit&amp;redlink=1" class="new" title="User:Viridiflavus (page does not exist)">Viridiflavus</a>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>