Finland.

Yellow ring with a black three alpha code, starting letter "S" OR "E"
followed by two letters.

note 1 :

Yellow ring with a black three alpha-numeric code,
starting letter "Y" OR "S" OR "E"
followed by two numbers OR a letter and a number OR a number and a letter.

note 1 : beware of a simiilar project in the UK.

note 2 :

White ring with a black three alpha code, starting letters 'Y' or 'E'.

note 1 :

White ring with a black three alpha-numeric code, starting letter 'C' or 'Y' or 'E' followed by a letter and a number OR followed by a number and a letter.

note 1 :

Combination of :
- blue flag with a three numeric code (000–999) on right tibia
- green ring (on left tibia).
- metal ring (on right tarsus).

note 1 :

White ring with a black 2 alpha-numeric code (on left tarsus) and metal ring (on right tarsus).

note 1 : used codes are : number/letter and letter/number.

note 2 : used letters/numbers are : 0–9 and A, C, F, H, J, K, L, M, N, P, T, U, V, W, X, Y.

note 3 :

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

note 1 : used codes are : letter-number-letter (e.g. A1A)

note 2 : used letters are : A, C, F, H, J, K, L, M, N, P, R, S, T, U, V, W, X, Y, Z.

note 3 : first letter do not include U or Z.

note 4 : rings used from 2023 onwards.

note 5 :

Dark-blue ring with a white two alpha-numeric code.

note 1 :

Dark-blue ring with a white two numeric code.

note 1 :

Dark-Blue ring with a white two alpha code.

note 1 : used letters are: A, C, F, H, J, L, M, N, P, R, T, U, V, W and X.

note 2