Flock of <i><a href="//commons.wikimedia.org/wiki/Chroicocephalus_ridibundus" title="Chroicocephalus ridibundus">Chroicocephalus ridibundus</a></i> (black-headed gull), with winter plumage, in <a href="//commons.wikimedia.org/wiki/Vienna" class="mw-redirect" title="Vienna">Vienna</a>, <a href="//commons.wikimedia.org/wiki/Austria" class="mw-redirect" title="Austria">Austria</a>.
<a href="//commons.wikimedia.org/wiki/User:Balles2601" title="User:Balles2601">Balles2601</a>
<span class="int-own-work" lang="en">Own work</span>