Male Ring-necked Duck <i><a href="//commons.wikimedia.org/wiki/Aythya_collaris" title="Aythya collaris">Aythya collaris</a></i>, Oso Flaco lake, San Luis Obispo, California.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/32541690@N02">Alan Vernon</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/32541690@N02/3506598428/">Male Ring-necked duck (Aythya collaris)</a>