Three American Pekin ducks at Hermann Park in Houston, Texas. One exhibits melanism, a trait with increased dark pigment production in the skin, fur, or feathers.
<a href="//commons.wikimedia.org/w/index.php?title=User:Marcia_Barnett&amp;action=edit&amp;redlink=1" class="new" title="User:Marcia Barnett (page does not exist)">Marcia Barnett</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>