The contrasting black and white plumage of the avocets creates a stunning view in the sky when the flock makes a synchronised turn in flight.
<a href="//commons.wikimedia.org/wiki/User:Dewittehaas.nl" title="User:Dewittehaas.nl">dewittehaas.nl, Schiermonnikoog</a>
<span class="int-own-work" lang="en">Own work</span>