Gulls

species: 
Caspian Gull
scientific name: 
Larus cachinnans
notes: 

Yellow ring with a black four alpha code.

note 1 : it is not possible to identify the ringed small chicks exactly, additional photos by observers are welcome. In most cases the gulls are Caspian Gulls or Herring Gulls, but note the existence of many hybrids.

note 2 :

email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Yellow [Y]
colour-ring code (of the c-ring): 
Four alpha code (4 letters).
countries where ringed: 
Germany.
First letter/number (of the c-ring): 
X