Lesser Black-backed Gull

Orange ring with a black four alpha-numeric code : starting cipher '3' or '2' -separated 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. : 3:AAA ... 3:ZZZ

note 4 : in 2014, 314 birds have been ringed (3:AAA-3:AZZ).

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

note 6 :

Green ring with a white four alpha-numeric code, starting letter "F" follwoed by a colon ":" and three numbers (on right tarsus) and metal ring (on left tarsus).

note 1 : birds ringed in Florida, USA.

note 2 : used codes are F:001, F:002,  

Green ring with a white three alpha-numeric code.

note 1 : birds ringed in Europoort, Rotterdam by Norman van Swelm.

note 2 :

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

note 1 :  

Red ring with a white four alpha-numeric code, starting letter 'M' followed by a letter en two numbers.

note 1 :

Dark blue ring with white 3 alpha-numeric code : F/number/letter.

note 1 : birds ringed at Flat Holm Island, Cardiff.

note 2 : used for adult birds from 1996 onwards.

note 3 : final letter  = A, B, C, D, E, H, J, K, L or M

note 4 : number = 0 - 9

note 5 : example codes are:  F1A, F9M etc

Dark blue ring with white 3 alpha-numeric code : number/number/F.

note 1 : birds ringed at Flat Holm Island, Cardiff.

note 2 : 01F - 07F ringed in 1994, 08F - 9F ringed in 1995.

White ring with black 3 alpha-numeric code : number/letter/F.

note 1 : birds ringed at Flat Holm Island, Cardiff.

note 2 : about 100 birds ringed in 2012.

note 3 : middle letter  = A, B, C, D, E, H, J, K, L or M.

note 4 : number = 0 - 9.

note 5 : example codes are:  2AF, 6EF, 9MF.

Light green ring with black 3 alpha-numeric code : number/letter/F.

note 1 : birds ringed at Flat Holm Island, Cardiff.

note 2 : about 100 birds ringed in 2006.

note 3 : middle letter  = A, B, C, D, E, H, J, K, L or M.

note 4 : number = 0 - 9.

note 5 : example codes are:  2AF, 6EF, 9MF.

Orange ring with either green or black 3 alpha-numeric code, number/letter/F.

note 1 : birds ringed at Flat Holm Island, Cardiff.

note 2 : about 200 birds ringed in 2001 and 2009

note 3 : middle letter  = A, B, C, D, E, H, J, K, L or M

note 4 : if characters are green then birds ringed in 2001, if black then 2009.

note 5 : number = 0 - 9.

note 6 : example codes are : 2AF, 6EF, 9MF