Gulls

species: 
Black-headed Gull
scientific name: 
Chroicocephalus ridibundus
notes: 

Dark-blue ring with a white four alpha code : starting letter 'R'.

note 1 : not used letters are : D, G, M, O, Q, W, Y, and Z.

note 2 :

 

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): 
Four alpha code (4 letters).
countries where ringed: 
France.
First letter/number (of the c-ring): 
R