Łubna rubbish dump is the largest stockyard of waste in Poland, so one of the best places to watching and reading gulls. Recently Michal Rycak and Marcin Sidelnik have read the 1cy Caspian gull (Larus cachinnans) with yellow plastic ring. The bird was ringed this year in Poland.
fot. Michal Rycak
See also some photos from Lubna at Bird pictures: Gulls in Amsterdam