The swarm of Mute Swans there and they are there since one century.
Kalispera Dell
CC BY 3.0
<a rel="nofollow" class="external free" href="https://web.archive.org/web/20161028040836/http://www.panoramio.com/photo/106667410">https://web.archive.org/web/20161028040836/http://www.panoramio.com/photo/106667410</a>