Cloister's Pond, Morro Bay, California.  This little chick was without adult supervision.  He/she was very actively feeding on surface and under water.
Joyce Cory on Flickr as <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/docentjoyce/">docentjoyce</a>
CC BY 2.0
<a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a>: <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/99003655@N00/2462151329">Pied-billed Grebe Chick</a>