Finland.

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

note 1 : project starts during 2017.

note 2 : used letters are : A, B, C, D, F, G, H, J, K, L, M, P, S, T, V, X, Z.

note 3 : used numbers are : 0, 1, 2, 3, 4, 5, 6, 7, 9.

note 4 :

Dark-green ring with a white two alpha code (on one leg) and metal ring (on the other leg). 

note 1 : 

Dark-green ring with a white two alpha code (on one leg) and metal ring (on the other leg). 

note 1 : 

Combination of :
* red ring with a white two numeric code (on left tibia).
* dark-blue ring (on right tibia).
* metal ring (on right tarsus).

note 1 : 

Combination of :
* yellow ring with a black two numeric code (on left tibia)
* blue ring (on right tibia)
* metal ring (on right tarsus)

note 1 : 

Dark-green ring with a white two alpha code.

note 1 : used codes are AA-ZZ.

note 2 :

White ring with a black three alpha code.

note 1 : used codes are JAA-JZZ.

note 2 :  

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

note 1 : project starts during 2016.

note 2 : used letters are : A, B, C, D, F, G, H, J, K, L, M, P, S, T, V, X, Z.

note 3 : used numbers are : 0, 1, 2, 3, 4, 5, 6, 7, 9.

note 4 :  

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

note 1 : used codes are :
* letter "C" or "F" or "H" or "J" followed ny number and letter.
* letter "C" or "F" or "H" or "J" followed by letter and number.
* letter "C" or "F" or "H" or "J" followed by letter and letter ... thus three alpha code (see project : http://www.cr-birding.org/node/5066

note 2 :

Red ring with a white 3 alpha code, starting letter 'C' .

note 1 : up to 2014, a total of 23 rings were delivered since 2013.

note 2 :