Herring Gull

Black ring with a white 2 alpha code with or without a bar between alpha. (mainly on right tibia).

note 1 : rings are 1,8cm. in height and re-placed above the knee (on the tibia) for better observation results in the colony (high vegetation) and on rubbish-dumps.

note 2 :

Yellow ring with a black 2 numeric code (mainly on right tibia).

note 1 : rings are 1,8cm. in height and placed above the knee (on the tibia) for better observation results in the colony (high vegetation) and on rubbish-dumps.

note 2 : the position of the metal ring can be left tibia or left tarsus.

note 3 :

Yellow ring with a black code 5 alpha code (starting letter 'H') and metal ring (on other leg).

note 1 :

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 : 

(dark) Blue ring with a white 2 alpha code with or without a bar between alpha. (mainly on right tibia).

note 1 : rings are 1,8cm. in height and placed above the knee (on the tibia) for better observation results in the colony (high vegetation) and on rubbish-dumps.

note 2 : the position of the metal ring can be left tibia or left tarsus.

note 3 :

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 :