Herring Gull

Black ring with a white four alpha-numeric code, starting letters 'KU' or 'KX'.

note 1 :  

Brown (umber) with a white two alpha code.

note 1 : used codes are with a ":" or a "+" between the two letters.

note 2 :

Red ring with a white two alpha code.

Red ring with a black two alpha code.

note 1 : used codes are with a ":" or a "+" between the two letters.

note 2 :

Black ring with a white two alpha code.

Black ring with a yellow two alpha code.

note 1 : used codes are with a ":" or a "+" between the two letters.

note 2 :

Violet/mauve ring with a white two alpha code.

note 1 : used codes are with a ":" or a "+" between the two letters.

note 2 :

Dark-green ring with a white two alpha code.

note 1 : used codes are with a ":" or a "+" between the two letters.

note 2 :

Pale-blue ring with a black two alpha code.

note 1 : used codes are with a ":" or a "+" between the two letters.

note 2 :

White ring with a black two alpha code.
White ring with a blue two alpha code.
White ring with a red two alpha code.
White ring with a green two alpha code.

note 1 : used codes are with a ":" or a "+" or a "=" between the two letters.

note 2 :

Yellow ring with a black two alpha code.

note 1 : used codes are with a ":" or a "+" between the two letters.

note 2 :

White ring with a black four alpha-numeric code : number / number / letter 'Y' / number (on left leg) and metal ring (on right leg).

note 1 : used codes 00Y0 - 99Y9.

note 2 :