Gulls

species: 
Black-headed Gull
scientific name: 
Chroicocephalus ridibundus
EURING code: 
05820
notes: 

White ring with a black four alpha-numeric code : starting letter "S" followed by a 3 alpha-numeric code.

note 1 : most of these rings will be used for gulls wintering in Croatia, mainly on Zagreb rubbish dump.
Some of them could be used on wintering Common Gulls (Larus canus).

note 2 :

email sighting submit: 
email sighting submit (2): 
snailmail sighting submit: 
Luka Jurinovic,Kikićeva 9, HR-10000 Zagreb, Croatia.
snailmail sighting submit (2): 
Institute of Ornithology, Gunduliceva 24, HR-10000 Zagreb, Croati
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
White [W]
colour-ring code (of the c-ring): 
Four alpha-numeric code (4 letters/numbers).
countries where ringed: 
Croatia.
First letter/number (of the c-ring): 
S