Open-fronted nestbox based on project of Jan Sokołowski, Polish ornithologist
<a href="//commons.wikimedia.org/w/index.php?title=User:Aung_wg_J._Soko%C5%82owskiego&amp;action=edit&amp;redlink=1" class="new" title="User:Aung wg J. Sokołowskiego (page does not exist)">Aung wg J. Sokołowskiego</a>
2007
<span class="int-own-work" lang="en">Own work</span>