Eurasian or Common Coot, <i><a href="//commons.wikimedia.org/wiki/Fulica_atra" title="Fulica atra">Fulica atra</a></i>. Female nesting in Hyde Park, London, June 2010. She's actually nesting on a head for a fountain, not that you can see that.
<a href="//commons.wikimedia.org/wiki/User:Ealdgyth" title="User:Ealdgyth">Ealdgyth</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>