<p>Yellow-rumped Warbler (Audubon's) (sub-adult female) at Morro Rock in Morro Bay, CA
Dendroica coronata - <a href="https://en.wikipedia.org/wiki/en:Yellow-rumped_Warbler" class="extiw" title="w:en:Yellow-rumped Warbler">en.wikipedia.org/wiki/Yellow-rumped_Warbler</a>
06dec2007 - Canon 1D Mark III 600mm IS w/ 1.4X II TE, on tripod - Photo by Mike Baird  <a rel="nofollow" class="external text" href="http://bairdphotos.com">bairdphotos.com</a>  
mike [at} mikebaird dot com
</p><p>wiki says "Three closely related North American bird forms (the eastern Myrtle Warbler, its western counterpart, Audubon's Warbler, and the Central American Goldman's Warbler) are periodically lumped as the Yellow-rumped Warbler (Dendroica coronata)". That makes this individual an Audubon's (now <i><a href="//commons.wikimedia.org/wiki/Setophaga_auduboni" title="Setophaga auduboni">Setophaga auduboni</a></i>) based on the western location (CA), and also the bright yellow throat is diagnostic according to Sibley, thanks to Gary - encouragement (see comment below)
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Used under the Creative Commons license at <a rel="nofollow" class="external text" href="http://trailmix.net/blogs/barlow/archive/2008/01/23/an-introduction-to-birding-with-children.aspx">trailmix.net/blogs/barlow/archive/2008/01/23/an-introduct...</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/72825507@N00">Mike Baird</a> from Morro Bay, USA
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/72825507@N00/2091939177/">Yellow-rumped Warbler (Audubon's) Dendroica coronata bird in Morro Bay, CA</a>