White-winged Tern <i><a href="//commons.wikimedia.org/wiki/Chlidonias_leucopterus" title="Chlidonias leucopterus">Chlidonias leucopterus</a></i>, Mścichy, Biebrza National Park, Poland
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/42244964@N03">Frank Vassen</a> from Brussels, Belgium
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/42244964@N03/4652700587/">White-winged Tern (Chlidonias leucopterus), Mścichy, Biebrzański Park Narodowy, Polska</a>