Herring Gull

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

note 1 : letter "W" is the scheme marker.

note 2 : used codes are : 1A:W, 1B:W ... 0Y:W, 0Z:W ... A1:W, A2:W ... Z9:W, Z0:W.

note 3 : c-ring on left tarsus and metal ring on right tarsus.

note 4 : also Lesser and Great Black-backed Gull is ringed. 

note 5 :  birds ringed in Walney Island, Cumbria (93 LBbG and 65 HG), Copeland, Ireland (1 LBbG and 15 HG), Bowland, Lancashire (24 LBbG and 1 HG), Skokholm, Pembrokeshire (72 LBbG and 2 HG).

note 6 :

Orange ring with a black four alpha-numeric code : starting cipher '2' or '3' -sepaterd by a colon ':' and followed by three letters (on right leg) and metal ring (on left leg).

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

note 2 : to be read from top till bottom.

note 3 : ex. : 2:AAA ... 2:ZZZ

note 4 : in 2014, 337 birds have been ringed (2:AAA-2:AZZ).

note 5 : note 5 : the project has some difficulties with the follow-up by mail of the resightings. Do please use the submit-page.

note 6 :

Yellow ring with a black four alpha-numeric code, starting letters AA followed by two number.

note 1 : birds ringed since 2014 in Stolzenau, Germany.

note 2 : used codes are AA01, AA02 ~~ AA99, AA00.

note 3 : new codes used during 2018 : AB00 to AB99.

note 4 :

Blue ring with a white four alpha-numeric code, starting letter 'F', followed by a colon (:) and three alpha-numeric or numberic code (on left tarsus).

note 1 :  

Blue ring ring with a 2 alpha-numeric code code.

note 1 : rings are placed above the knee (on the tibia) for better observation results in the colony (high vegetation) and on rubbish-dumps. All other colours (with vertical placed codes) above the knee are also part of this project.

note 2 : In some series  used dots (1.A), colons (1:A) or single or double bars (1|A or 1||A). Those additional marks are part of the code

note 3 : In some series is an additional plain marker present at the other tibia, this marker is part of the combination.

note 4: Same codes can be used by other large gull species. If you have doubts about the species and/or code, please note the age and position of all the rings, including the metal ring.

note 5: used letters/numers are : A, B, C, D, E, F, G, H, J, K, L, M, N, P, R, S, T, U, V, W, X, Y, Z, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, + and =. Only the letters I, O and Q are never used

note 6: In this project are also used a combination of two coloured rings with both one letter or number at each tibia.

note 7 : 

Red ring with a white four alpha-numeric code : first letter 'R' followed by a colon ":" and three numbers.

note 1 : used codes are R:001... R:699.

Combination of :
* yellow ring (letter 'E) (on one leg)
* yellow ring with a black four alpha-numeric code (letter E and three numbers) (on the other leg) and NO metal ring.

note 1 : birds are ringed at Europoort, The Netherlands by Norman van Swelm.

note 2 : 

Dark blue ring with a white four alpha-numeric code, starting letter 'W' followed by a colon ':' and three numbers or two numbers and a letter.

note 1 : used codes are W:001, W:002, ... W:999.

note 2 : birds have been ringed since 2013 in Falmouth, Cornwall, as part of a study of behaviour and movements of urban gulls.

note 3 : c-ring position can be either leg.

note 4 : 

White ring with a 4 alpha-numeric code (starting letter 'V').

note 1 :

White ring with a black four alpha-numeric code, starting letter 'Y' followed by ' : ' and three numbers.

note 1 : used codes are Y:001 - Y:999.