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 (:) / letter "A" / number / letter

note 1 : used letters are  A, B, C, F, H, J, K, L, M, N, P, R, S, T, U, V, W and X.

note 2 : used numbers are 0-9.

note 3 : birds ringed since 2012.

note 4 : ex. : N:A3X, N:A0A, ...

email sighting submit: 
email sighting submit (2): 
email sighting submit (3): 
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).
colour-ring position (of the c-ring): 
Tarsus left.
countries where ringed: 
Spain.
First letter/number (of the c-ring): 
N: