A female Ruff at Martin Mere, Lancashire, England (gender as indicated by flickr photographer, who presumably was able to differentiate sexes by comparison of the size of the birds).
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/9292942@N08">Gidzy</a>
CC BY 2.0
originally posted to <b><a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a></b> as <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/9292942@N08/4319712147">Ruff, female, Martin Mere January 2010</a>