Western Marsh Harrier
scientific name: 
Circus aeruginosus

Dark-blue ring with a white three alpha-numeric code :
starting letters "A" or "B" or "C" or "D" or "E" followed by two numbers.

note 1 : birds ringed in 5 core areas, each with a different starting letter.

note 2 : birds ringed from 2020 onwards.

note 3 :

email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Dark Blue [B]
colour-ring code (of the c-ring): 
Three alpha-numeric code (3 letters/numbers).
countries where ringed: 
Czech Republic.
First letter/number (of the c-ring): 
A or B or C or D or E