Great Black-backed Gull

Combination of 4 rings (incl. alu.ring).

note 1 : maximum two rings on each tarsus.

Yellow ring with a black three alpha-numeric code (nxn, where n=number and x=letter) (on right tarsus) and metal ring (on left tarsus).

note 1 : all birds are ringed in the Bailiwick of Guernsey.

note 2 : Annual Reports are available on the Guernsey Gulls web site (www.guernseygulls.co.uk) and also on the Guernsey Gulls Blogspot (www.guernseygulls.blogspot.com).

note 3 : 

Black ring with a yellow three alpha code (on left leg) and metal ring (on right leg).

note 1 :

Black ring with a white four alpha-numeric code : starting letter C folowed by a combination of 3 further letters and numbers

note 1 : 700 rings were used during 1996-2008.

note 2 : there can exist small text or check marks (spots) in the code, please, inform them also.

Black ring with a white five alpha-numeric code : letter J and 4 numbers/letters .

note 1 : birds are ringed in South-Norway.

Pale-blue ring with a black four alpha-numeric code : letter 'J' followed by 3 letters/numbers.

note 1 : birds are ringed in South-Norway.

note 2 : used codes for the pale-blue rings are: JA00-99, JB00-99, JC00-99, JD00-99, JL01-50, JR00-99.

Orange ring with a black single letter code (on left leg) and metal ring (on right leg) with two small c-rings.

note 1 :

Orange ring with a green three alpha code.

note 1 : birds are ringed on the Island of North Rona, 70km. NW Cape Wrath, Scotland.

note 2 : 160 pullus ringed in June 2001.

note 3 : 15 adults ringed in May 2002.

Orange ring with a black 4 alpha-numeric code (on left tarsus) [ letter, letter, number, T ] or [ letter, number, letter, T ] or [ number, letter, letter, T] and metal ring (on right tarsus) with as scheme site identifier is T (for Thames) (as last letter).

note 1 : unused codes are the letters E, I, O and Q and additionally, to avoid the remote possibility of any confusion with YLG in Spain, codes will not start with the letter B.

note 2 :

Orange ring with a black code five alpha-numeric code, starting letter 'C'.

note 1 : up to 2014, a total of 110 rings were delivered since 2001-2008.

note 2 :