Gulls

species: 
Lesser Black-backed Gull
scientific name: 
Larus fuscus
notes: 

White ring with black five alpha-numeric code : starting letter 'C' and xxxx (where x is a number or letter).

note 1 :

email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
White [W]
countries where ringed: 
Finland.
First letter/number (of the c-ring): 
C