Gulls

species: 
Glaucous Gull
scientific name: 
Larus hyperboreus
notes: 

Yellow ring with a black five alpha-numeric code (on one leg) and metal ring (on other leg).

note 1 : first letter "C" / number / letter / number / number.

note 2 : 

website sighting submit: 
Luomus, Finnish Ringing centre,
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): 
Five alpha-numeric code (5 letters/numbers).
countries where ringed: 
Finland.
First letter/number (of the c-ring): 
C