Is not the first Croatian Black-headed Gull (Chroicocephalus ridibundus) who visit the Miedwie Lake (the fifth bigest lake in Poland). They really like roosting place on the north coast (Morzyczyn). Look forward to hearing from Luka about ringing details.
fot. Lukasz Borek - gulls readers :)
fot. Lukasz Borek - white SK41, 14.08.2011 Miedwie Lake