Black-headed Gull

Red ring with a white two numeric code.

note 1 : old red rings are turning pink.

note 2: a "." sign is to be read within the codes.

note 2 : code used is number/number.

note 3 : all birds ringed during winter in city-parks.

note 4  : all rings have to be read from bottom to top.

Black ring with a white four alpha code, starting letter 'A'.

note 1 :  

White ring with a black four alpha-numeric code : starting letter 'K' followed by letter 'A' and two numbers.

note 1 :  birds are ringed in the Omsk Region.

note 2 :

White ring with a black four alpha-numeric code : starting letter "T" followed by a black three alpha-numeric code.

note 1 : used codes are : TTA1-TTA0 ; TTC1-TTC0 ; TTE  ... TUY0 ; and continuing ...

note 2 :

Yellow ring with a black four alpha-numeric code, starting letter 'T'.

note 1 :

Yellow ring with a black four alpha-numeric code (starting 2, then 'xxn'' where 'x' is a letter and 'n' a number.

note 1 : used codes are : 2AA0-2AY9 , 2BA0-2BY9 , 2CA0-2CY9 , 2EA0-2EY9 ,

note 2 :

Dark-blue ring with a white four alpha code : starting letter 'R'.

note 1 : not used letters are : D, G, M, O, Q, W, Y, and Z.

note 2 :

Dark-green ring with a white four alpha-numeric code, starting letter "J".

note 1 :

Red ring with a white four alpha-numeric code (starting number "2") 

note 1 : several ringers participate(d) on the project : for details and direct contact information for the project leader, please, click on the following link: 

https://app.bto.org/static/files/euring/Black-headed_Gull_UK.pdf

Orange ring with a black four alpha-numeric code (starting number "2")

note 1 : several ringers participate(d) on the project : for details and direct contact information for the project leader, please, click on the following link: 

https://app.bto.org/static/files/euring/Black-headed_Gull_UK.pdf