Picture informations: Black-headed gull, wing juvenile

Author(s) Rainer Borcherding
Licence owner Schutzstation Wattenmeer
Licence statement Copyrighted Material; the copyright remains with the author (not this web publication)
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Black-headed gull, wing juvenile  

Picture informations: Black-legged kittiwake, wing juvenile

Author(s) Rainer Borcherding
Licence owner Schutzstation Wattenmeer
Licence statement Copyrighted Material; the copyright remains with the author (not this web publication)
Licence cc-by-sa 3.0
Black-legged kittiwake, wing juvenile  

Picture informations: Little gull, wing juvenile

Author(s) Felix Timmermann
Licence owner Jordsand
Licence statement Copyrighted Material; the copyright remains with the author (not this web publication)
Licence cc-by-sa 3.0
Little gull, wing wing juvenile  

Picture informations: Mediterranean gull, wing wing juvenile

Author(s) Richard Crossley
Licence owner Richard Crossley
Licence statement Copyrighted Material; the copyright remains with the author (not this web publication)
Licence cc-by-sa 3.0
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Mediterranean gull, wing wing juvenile