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Gulls, shearwaters

Great cormorant

Picture informations: Great cormorant
Author(s) Matthew Britton
Licence owner Matthew Britton
Licence statement Copyrighted Material; the copyright remains with the author (not this web publication)
Licence cc-by-sa 3.0
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Great cormorant  

Mergansers

Picture informations: Mergansers
Author(s) Fabian Schrauth
Licence owner NABU
Licence statement Copyrighted Material; the copyright remains with the author (not this web publication)
Licence cc-by-sa 3.0
Beak slender, serrated edges, head with feather tuft  

Light gulls

Picture informations: Light gulls
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
Body white, back aund head often darker  

Dark gulls

Picture informations: Dark gulls
Author(s) Felix Timmermann
Licence owner Verein Jordsand
Licence statement Copyrighted Material; the copyright remains with the author (not this web publication)
Licence cc-by-sa 3.0
Body grey or brown, without completely white parts