Sooty Tern <i><a href="//commons.wikimedia.org/wiki/Onychoprion_fuscatus" title="Onychoprion fuscatus">Onychoprion fuscatus</a> fuscatus</i>, Mars Bay Breeding Grounds, Ascension Island. Approx 130,000 breeding pairs total.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/33590535@N06">Drew Avery</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/33590535@N06/3206504544/">Atlantic Sooty Tern</a>