Swans

species: 
Whooper Swan
scientific name: 
Cygnus cygnus
notes: 

Red ring with a white three alpha-numeric code, starting letter 'B' followed by two numbers. 

note 1 :

email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Red [R]
colour-ring code (of the c-ring): 
Three alpha-numeric code (3 letters/numbers).
countries where ringed: 
Bulgaria.
First letter/number (of the c-ring): 
B