Swans

species: 
Whooper Swan
scientific name: 
Cygnus cygnus
notes: 

Yellow neckband with a black four alpha-numeric code.

note 1 : used codes are 1R00-1R99, 3R00-3R99, 0T00-0T99 and 2T00-2T99, 3T00-3T99, 0U00-0U99 and 2U10-2U14 (these 5 with mounted GPS transmitters).

note 2 :

website sighting submit: 
Ornithological Station Poland
email sighting submit: 
colour-ring type: 
Neckband.
colour-ring colour (of the c-ring): 
Yellow [Y]
colour-ring code (of the c-ring): 
Four alpha-numeric code (4 letters/numbers).
countries where ringed: 
Poland.