Finland.

Red ring with a white three alpha code (on left leg) and metal ring (on right leg).

note 1 : birds ringed since 2024.

note 2 : all fist letters but not P and B.

note 3 :

Dark-blue ring with a white alpha/numeric code (on right tarsus).

note 1 : direction of reading the alpha code : from the top of the ring.

note 2 : birds ringed from 2020 onwards.

note 3 : used letters are : A, C, E, H, L, M, N, P, V, Z, numbers 0-9- starting A00, A01 etc.

note 4 : ringing site from 2020 onwards will be Finland.

note 5 :

Dark-blue ring with a white alpha/numeric code (on right tarsus).

note 1 : direction of reading the alpha code : from the top of the ring.

note 2 : birds ringed from 2020 onwards.

note 3 : used letters are : A, C, E, H, L, M, N, P, V, Z, numbers 0-9- starting A00, A01 etc.

note 4 : ringing site from 2020 onwards will be Finland.

note 5 :

Yellow ring with a black two numeric code.

note 1 : used numbers are : 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.

note 2 :

Yellow ring with a black two alpha code.

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

note 2 :

Yellow ring with a black two alpha-numeric code.

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

note 2 : used numbers are : 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.

note 3 :

Orange ring with a black three alpha-numeric code.

note 1 : used code is A10.

note 2 : bird ringed in Oulo, Finland.

note 3 :

Combination of 4 c-rings : 
* 3 c-rings (on left leg)
- c-ring above metal ring (on right leg).

note 1 :

White neckband with a black three alpha code.

note 1 :  GPS-tags which also have black solar panels.

note 2 :

Yellow ring with black three alpha code, starting with letter “E” OR “S” or "Y", followed by two letters.

note 1 :