Legs of a <a href="https://en.wikipedia.org/wiki/Bird_ringing" class="extiw" title="en:Bird ringing">ringed</a> <a href="https://en.wikipedia.org/wiki/Lesser_Black-backed_Gull" class="extiw" title="en:Lesser Black-backed Gull">lesser black-backed gull</a> (<i><a href="//commons.wikimedia.org/wiki/Larus_fuscus" title="Larus fuscus">Larus fuscus fuscus</a></i>) at the <i>Tokoinranta</i> park in <a href="https://en.wikipedia.org/wiki/Kallio" class="extiw" title="en:Kallio">Kallio</a>, Helsinki, Finland on 23rd April 2006. The bird has been ringed as a nestling in Helsinki on 14th July 1999.
<a href="https://en.wikipedia.org/wiki/fi:User:Thermos" class="extiw" title="w:fi:User:Thermos">Thermos</a> at <a href="https://en.wikipedia.org/wiki/fi:" class="extiw" title="w:fi:">Finnish Wikipedia</a>
CC BY 2.5
Self-published work by <a href="https://fi.wikipedia.org/wiki/User:Thermos" class="extiw" title="fi:User:Thermos">Thermos</a> at <a class="external text" href="https://fi.wikipedia.org">fi.wikipedia</a>