Cuckoos

species: 
Cuckoo
scientific name: 
Cuculus canorus
notes: 

White ring with a black two alpha-numeric code.

note 1 :

email sighting submit: 
email sighting submit (2): 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
White [W]
colour-ring code (of the c-ring): 
Two alpha-numeric code (2 letters/numbers).
countries where ringed: 
Serbia.