Picture taken at Rotterdam's Blijdorp Zoo, Netherlands. Several couples of mandarin ducks were all engaged in making love in a pond in the zoo.
<a href="//commons.wikimedia.org/wiki/User:Erik_Zachte" title="User:Erik Zachte">Erik Zachte</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>