Swans

species: 
Whooper Swan
scientific name: 
Cygnus cygnus
notes: 

White ring with a black three alphanumeric code. 

note 1 :

email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
White [W]
colour-ring code (of the c-ring): 
Three alpha-numeric code (3 letters/numbers).
countries where ringed: 
Iceland.
United Kingdom. and Ireland.