Glaucous Gull

Black ring with a white four alpha code, starting letter "G", followed by a colon “:”

note 1 :

Blue ring with a white two alpha code.

note 1 :

Yellow ring with a black five alpha-numeric code (on one leg) and metal ring (on other leg).

note 1 : first letter "C" / number / letter / number / number.

note 2 : 

Yellow ring with a black two alpha-numeric code (on one leg) and metal ring (on other leg).

note 1 : 

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

note 1 : later : letter "Y" followed by a colon ':' letter and two numbers.

note 2 : used codes are: Y:001-Y:999 and later Y:A01-Y:Z99, ...

note 3 : used letters are : A, B, C, D, F, G, H, J, K, L, M, P, S, T, V, X, Z.

note 4 :    

Yellow ring with a black two alpha code (1997-2003 – adults only)

note 1 : birds are ringed on Bjørnøya (Bear Island), Svalbard, Norway.

White ring with a black alpha code (year-code) (1998-2004 – chicks only)

note 1 : birds are ringed on Bjørnøya (Bear Island), Svalbard, Norway.

Green ring with a white code (since 1997).

note 1 : birds are ringed on Bjørnøya (Bear Island), Svalbard, Norway.

Combination of 3 rings (on right leg).

note 1 : used colours  are : green, yellow, red, blue), metal ring with lock on left leg.

note 2 :  four gulls were caught in the Gulf of Gdansk area (2003, 2006, 2007, 2011). One resighting from Bornholm.

Yellow ring with a black code (F/CF) (on right leg) and metal ring (on left leg).

note 1 :