Finland.

Blue neckband with a white three alpha-numeric code (one vertical and two horizontal).

note 1 :

Dark-green ring with a white three alpha code (on left tibia) and metal ring (on right tibia).

note 1 : used numbers are : used letters are : A, C, F, H, K, L, N, P, R, S, T, V, X, Z.

note 2 :

Dark-green ring with a white four alpha code (on left tibia) and metal ring (on right tibia).

note 1 : used letters are : A, C, F, H, K, L, N, P, R, S, T, V, X, Z.

note 2 : later four alpha-numeric code will be used and used numbers are : 1, 2, 3, 4, 5, 6, 7, 8, 9.

note 3 :

Combination of :
* one c-ring (on right tarsus).
* one c-ring (on right tibia).
* one c-ring (on left tibia).
* metal ring (on either right tarsus, right tibia or left tarsus).

note 1 : used colours are : dark green (left tibia) ; white, yellow, orange, red, dark green, light green (lime), dark blue (on right tarsus and right tibia).

note 2 :

Combination of :
* one c-ring (on right tarsus).
* one c-ring (on right tibia).
* one c-ring (on left tibia).
* metal ring (on either left tarsus, right tarsus or right tibia)

note 1 : used colours are : dark green (on left tibia), white, yellow, orange, red, dark green, pale green (lime) and dark blue (on right tibia and right tarsus).

note 2 :

Combination of :
* 1 c-ring (a specific colour for each sex).
* metal ring.

note 1 : the aim is to identify male and female reed warblers in the field for a response to parasitism experiment.

note 2 : from 2019 onwards:
- adult females: single white uncoded ring on left tarsus, metal ring on right tarsus.
- adult males: single orange uncoded ring on left tarsus, metal ring on right tarsus.

note 3 :

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

note 1 : used letters and numbers for alpha-numeric code are : A, C, E, H, J, L, M, P, T, U, V, X, Y, 0-9.

note 2 :

Dark-blue ring with a white three alpha code, starting letter "C"  (on left leg) and metal ring (on right leg).

note 1 :

Yellow ring with a black four alpha-numeric code, starting letter "F" : 
Fxxq and Fqxx, where x is either letter or number and q is a letter (for checking) (on left tibia and metal ring (on right tarsus).

note 1 :

Dark-blue ring with white 2 alpha-numeric code (on one leg) and metal ring (on other leg).

note 1 : a total of 289 rings delivered since 2018.

note 2 : used code : letter/number.

note 3 :