Eggs of <a href="//commons.wikimedia.org/wiki/Cygnus_olor" title="Cygnus olor">Cygnus olor</a>
<a href="//commons.wikimedia.org/wiki/User:Qualc1" title="User:Qualc1">Roberto Zanon</a>
CC BY 2.5
Photo taken by <a href="//commons.wikimedia.org/wiki/User:Qualc1" title="User:Qualc1">Roberto Zanon</a>