Great Black-backed Gull

Yellow ring with black four alpha-numeric code : xLyz (where x = digits 2 to 0, y = digits 1 to 0, z = letters A, C) eg. 1L1A.

note 1 : few rings were used on full grown birds at the coastal Lithuania.

Yellow ring with black five alpha-numeric code : starting letter KJ and xxx (where x is a number or letter).

note 1 : 2 rings used in Russian Karelia during 2004, no metal ring.

White ring with a black four alpha-numeric code.

note 1 :

White ring with three alpha code (on left leg) and metal ring (on right leg).

note 1 :

White ring with either black or red 4 alpha-numeric code : starting letter 'A', followed by a number combination or letters (on right leg).
(eg A2AA).

note 1 : the metal BTO is fitted on the left leg.

note 2 : used codes are A1AA - A1ZZ black characters on white,  A2AA - A2ZZ black characters on white, A3AA - A3ZZ black characters on white, A4AA - A4ZZ black characters on white, A5AA - A5ZZ red characters on white, A6AA - A6zz black characters on white,  A7AA - A7ZZ black characters on white.

note 3 : codes will be used till A9**. The wild gull chicks have been ringed on roof nests along the south coast.

White ring with a black four alpha-numeric code, starting letter 'R', followed by letter, number, letter OR number, letter, number. 

note 1 : do please pay attention to the colon “R:” as this is very important.

note 2 : the birds are ringed on the Nature Reserve of Lilleau Niges,  Re Island, Charente Maritime department, France.

note 3 : 190 birds ringed up to Feb 2013.

White ring with a red four alpha-numeric code : starting letter "L", follwed by a colon ":" followed by letter-letter-number” (eg L:AB1).

note 1 : birds are ringed as pulli on St Georges Island, Looe, Cornwall, England, the site of the largest GBBG colony in Cornwall with about 70-80 pairs.

note 2 : rings read from bottom to top with L : nearest the foot.

note 3 : pay attention to the colon ! (eg L:AA1, L:AA2, … L:AB1, L:AB2 etc).

note 4 : Numbers ringed per year as follows:

2010 - 49
2011 - 91
2012 - 24

note 5 : Scheme extended to Mullion Island, The Lizard and to Falmouth, Cornwall in 2013

White ring with a black five alpha-numeric code (on right leg), : starting with M- and followed by 2 numbers then 2 letters, metal ring (on left leg).

note 1 : birds are ringed at Lilla Karlsö, Gotland, Sweden.

note 2 : approx 200 birds ringed so far.

note 3 : 

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.

White ring with a red four alpha-numeric code (starting letter 'P', followed by ':' / number / number/ letter.

note 1 : scheme started June 2012 on the Break Waters of Portland Harbour Dorset.

note 2 : 82 birds ringed in 2012, starting with code P:00A.

note 3 : from 2012 this project has concentrated on the gull pulli on the Portland Harbour Breakwaters with over 600 ringed to date. The final letters of the coloured ring series in use are A,B,C,D,H,K,L and soon M.

note 4 :