Herring Gull

Yellow ring with a black four alpha-numeric code :
letter / number / number / ":" (colon) / letter "W".

note 1 : used codes are :

Yellow ring with a black 4 alpha code (starting letter 'H') and metal ring (on other leg).

note 1 :

Dark-green ring with a white four alpha-numeric code (on left tarsus) and metal ring (on right tarsus).

note 1 : starting code is letter "B:" (note the colon) followed by three numbers.

note 2 : 

Red ring with a white four alpha-numeric code :
- number / number / number / ":"/ letter 'D' (on  left tarsus).
- letter / number / number / ":"/ letter 'D' (on  left tarsus).
- number / letter / number / ":"/ letter 'D' (on  left tarsus).

note 1 : some 200 birds HG/LBbG/GBbG are ringed in Dublin during 2017.

note 2 : 

White ring with a red three alpha-numeric code : one number and two letters.

note 1 : used codes are 1NH - 5YH (35 rings used).

note 2 : 

Dark-green ring with a white four alpha-numeric code, starting letter "N:" followed by number/number/letter or number/letter/number or letter/number/number (on left tarsus) and metal ring (on right tarsus).   

note 1 : used letters are A, B, C, D, E, G, J, K, L, M, P, R, S, T, U, V, W and Y.

note 2 : not used letters are : F, H, I, N, O, Q, X and Z.

note 3 : the letter is the scheme identifier, so : N:11A, N:21A...N:99A, N:00A...N:11Y... N99Y, N:00Y or N:A11…N:Y99, or N:1A1….N:9Y9.

note 4 :

Red ring with a white four alpha-numeric code : starting letter "W" / ":" (colon) / number / number / number (on right tarsus) and metal ring (on left tarsus).

note 1 : used codes are : W:801 - W:999

note 2 :  

Orange ring with a black four alpha-numeric code : xxx and letter 'H', where x can be a letter or a number.

note 1 :

Blue ring with an orange 3 numeric code.

note 1 :

White wingtag with a black three alpha-numeric code.

note 1 : used codes are : letter "E" follwed by a letter and a number.

note 2 :