A Clark's Grebe swimming on Santa Margarita Lake, San Luis Obispo County, California, USA. It has juveniles riding on its back.
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/28867468@N08">marlin harms</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/marlinharms/4955886262/">Clark's Grebe Aechmophorus clarkii &amp; Young</a>