Barnacle Goose

Blue ring with a white two alpha-numeric code.

note 1 :

White neckband with a black three alpha-numeric code, starting letter ‘A’, ‘B’, ‘C’, ‘D’ and ‘F’ followed by two numbers.

note 1 : birds marked are part of the UK naturalised population.

note 2 :

Yellow ring with a black three alpha-numeric code.

note 1 : used codes : letter/number/number : A00, A01, ...

note 2 : rings used on a UK population.

note 3 :

Light-green / lime ring with a black two alpha-numeric code.

note 1 :

Light-green / lime ring with a black three alpha code.

note 1 :

Orange ring with a black three alpha code.

note 1 :

Yellow ring with a black three alpha code.

note 1 :

Black neckband with a white three alpha code.

note 1 : these include both GPS-tags and traditional neckbands.

note 2 :

Combination of a blue ring with a three alpha-numeric code (on one leg) and a c-ring (on other leg).

note 1 : used code : letter / number / number.

note 2 : used colours are : : red, white, orange, yellow, grey, blue, black, brown, green, lime.

note 3 :

Orange ring with a black two alpha code, letters separated by to vertical line.

note 1 :