Black-legged Kittiwake

Black ring with a white 3 alpha code.

note 1 : use codes are : A/letter/letter.

note 2 : birds ringed in Hartlepool, England.

note 3 :

Black ring with a white 3 alpha-numeric code

note 1 : use codes are : A/number/letter, A/letter/number, A/number/number

note 2 : birds ringed in Hartlepool, England.

note 3 :

Blue ring with a white three alpha-numeric code, starting letter "X" followed by  number/letter OR number/number.

note 1 :

Blue ring with a white three alpha code, starting letter "X"

note 1 :

Dark-green ring with a white three alpha code (first letter 'A' (on one leg) and metal ring (on other leg).

note 1 : used code are :

note 2 :

Dark-green ring with a white three alpha-numeric code (first letter 'A' (on one leg) and metal ring (on other leg).

note 1 : used code are : letter 'A', followed by a letter and a number OR a number and a letter.

note 2

Red ring with a white three alpha-numeric code (first letter 'B' (on one leg) and metal ring (on other leg).

note 1 : used code are : letter 'B', followed by a letter and a number OR a number and a letter.

note 2 :

Red ring with a white three alpha code (first letter 'B') (on one leg) and metal ring (on other leg).

note 1 : used codes are :

note 2 :

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

note 1 : used codes are : first letter X followed by letter/number or number/letter.

note 2 :

Violet / Mauve / Purple ring with a white two alpha code (on one leg) and metalr ring (on other leg).

note 1 : some of the rings will have geolocators on at some point in time.

note 2 :