Wagtails

species: 
Black-headed yellow wagtail
scientific name: 
Motacilla flava feldegg
notes: 

White ring with a black three alpha-numeric code, starting letter 'A' and metal ring.

note 1 :

email sighting submit: 
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.
First letter/number (of the c-ring): 
A