Forster's tern (Sterna forsteri) observed at the Bolsa chica reserve , California.  The Forster's Tern is the only tern restricted almost entirely to North America throughout the year.  Reference &lt;a href="<a rel="nofollow" class="external free" href="http://identify.whatbird.com/obj/470/overview/Forsters_Tern.aspx">http://identify.whatbird.com/obj/470/overview/Forsters_Tern.aspx</a>" rel="nofollow"&gt;identify.whatbird.com/obj/470/overview/Forsters_Tern.aspx&lt;/a&gt;
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/32541690@N02">Alan Vernon</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/32541690@N02/3705640016">Forster's tern in winter plumage #1</a>