Gulls

species: 
Yellow-legged Gull
scientific name: 
Larus michahellis
notes: 

White ring with a black four alpha-numeric code, starting letter 'N' followed by a colon (:), the numbers "1" or "2" and two letters .

note 1 : the birds are ringed on the city of Ceuta (Spain).

note 2 : four alpha-numeric code "N:1LL". "LL" are two letter starting for "NA".

note 3 : four alpha-numeric code "N:2LL". "LL" are two letter starting for "AA".

note 4 :

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): 
Four alpha-numeric code (4 letters/numbers).
countries where ringed: 
Spain.
First letter/number (of the c-ring): 
N: