Crows

species: 
Rook
scientific name: 
Corvus frugilegus
notes: 

Yellow ring with a four alpha-numeric code, starting letter "U" followed by a three numeric code or from 2023 onwards : yellow U + letter + 2 numbers.

note 1 : used codes are U100- U999.

note 2 : used codes are UA00 ...

note 3 :

email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Yellow [Y]
colour-ring code (of the c-ring): 
Four alpha-numeric code (4 letters/numbers).
colour-ring position (of the c-ring): 
Tarsus right.
countries where ringed: 
Germany.
First letter/number (of the c-ring): 
U