![Kolring TEAM [POLAND] - The Polish Bird Banding Blog [bird ringing]](http://3.bp.blogspot.com/_sa0MIEjaQ24/Su34xliJ0hI/AAAAAAAAAQ4/-fdWJ6Rvzks/S1600-R/kolring_bannerr.png)
fot. Piotr Zientek - yellow PDVX (Poland)
fot. Piotr Zientek - ad. Herring Gull (Larus argentatus) white MA014, (Sweden)
fot. Piotr Zientek - ad. Great Black-backed Gull (Larus marinus) white M75XR, (Sweden)
fot. Piotr Zientek - 3cy Great Black-backed Gull (Larus marinus) white M06UR, (Sweden)
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