Swans

species: 
Mute Swan
scientific name: 
Cygnus olor
notes: 

Blue ring with a white four alpha-numeric code, starting letter "C".

note 1 :

email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Dark Blue [B]
colour-ring code (of the c-ring): 
Four alpha-numeric code (4 letters/numbers).
countries where ringed: 
United Kingdom.
First letter/number (of the c-ring): 
C