Swans

species: 
Whooper Swan
scientific name: 
Cygnus cygnus
EURING code: 
01540
notes: 

Blue neckband with a white four alpha-numeric code.

note 1 : used codes are 1C00-1C99, 2C00-2C99, 3C00-3C99, 4C00-4C99, 6C00-6C99, 0E00-0E99, 1E00-1E99, 2U21, 2U22, 2U50-2U52, 2U54-2U59, 2E00-2E99, 3E00-3E99, 2E00-2E99, 3E00-3E99, ....

note 2 : neck collars CT30 and CT39 are used on Whoopers.

snailmail sighting submit: 
Dmitrijs Boiko,
colour-ring type: 
Neckband.
colour-ring colour: 
Blue (Dark) [B]
colour-ring code: 
Four alpha-numeric code (4 letters/numbers).