Cranes

species: 
Common Crane
scientific name: 
Grus grus
notes: 

White ring with a black three alpha-numeeic code : letter/number/number.

note 1 :  

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: 
Poland.