Finland.

White ring with a black four alpha-numeric code, starting letter 'C'.

note 1 : up to 2014,a total of 50 rings were delivered since 2004.

note 2 :

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

note 1 :  up to 2014 total 545 rings delivered, since 1997-2001.

note 2 :

Black ring with a white four alpha-numeric code, starting letter 'C'.

note 1 :

Black ring with a white three alpha-numeric code, starting letter 'C'.

note 1 :

Yellow ring with a black three alpha-numeric code, starting letter 'C'.

note 1 : up to a total of 197 rings delivered 1996.

note 2 :

White ring with a black four alpha-numeric code, starting letter 'C'.

note 1 : up to a total of 512 rings delivered 1995.

note 2 :

Yellow ring with a black four alpha-numeric code, starting letter 'C'.

note 1 :

White ring with a black three alpha-numeric code, starting letter 'C'.

note 1 : up a total 170 rings delivered 1996-1997 and 58 during 2008.

note 2 :

Combination of 3 c-rings and metal ring.

note 1 : used colours are : blue, red, yellow, orange, green, light-green, light-blue, black, white and double coloured blue/yellow, red/yellow, blue/white.

note 2 : metal ring either on tarsus (steel) or on tibia (aluminium). Colour rings always on tarsus.

note 3 : birds have been ringed since 1994 in Finnish coast of Bothnian Bay (Baltic Sea).

note 4 : the number of color ringed individuals is ca. 200 birds.

note 5 :

White ring with a black four alpha-numeric code, starting letter 'C'.

note 1 : up to 2014, a total of 300 rings were delivered since 1995-2005.   

note 2 :