Finland.

Yellow ring with a black 5 alpha-numeric,  starting letter 'C'.

note 1 : up to 2014, a total of 3626 rings were delivered since 1996.

note 2 :

Combination of :
- 2 c-rings (on left tibia)
- 1 c-ring (on left tibia)
- 1 c-ring (purple/mauve) (on right tibia)
- 1 c-ring (purple/mauve) (on right tarsus)
- metal ring (on right tarsus)

note 1 : used colours are : white, yellow, ornage, red, light-green/lime, dark-green, purple/mauve, black, dark-blue.

note 2 :  International Wader Study Group, The Register.

note 3 :

Combination of :
- blue ring (on left tibia)
- 1 or 2 c-rings (on left tarsus)

note 1 : used colours are : white, yellow, ornage, red, light-green/lime, dark-green, purple/mauve, black, dark-blue.

note 2 :  International Wader Study Group, The Register.

note 3 :

Combination of :
- white ring with a black three alpha-numeric code
- metal ring.

note 1 : used letters and numbers are : 0-9, A,B,C,F,H,J,K,L,M,N,P,R,S,T,U,V,W,X,Y.

note 2 : see also : http://www.luomus.fi/en

note 3 :

One (uncoded) c-ring (on left leg) and metal ring (on right leg).

note 1 : birds are ringed as nestlings and followed them during the post-fledging period ​and are followed by radio-telemetry ​(in collaboration with Dr. Jarkko Rutila, our Finnish cooperating researcher and ​the ​holder of the research permit).

note 2 : each chick has a metal ring (right leg) and a single color ring (left leg). Colors would be reused per each brood (broods are spatially distant and a combination of the c-ring plus radio-telemetry signals would exclude any identification confusions).

note 3 : the target of our project is not migration but simply id recognition of chicks during first 2 to max. 3 weeks postfledge.

note 4 :

Dark-blue ring with a white three alpha-numeric code : starting letter "F" followed by letter/number.

note 1 : first birds ringed during 2015.

note 2 : used codes are : FI0 ... FI9, ...

note 3 :

Combination of :
​* orange ring with a black two alpha code (on left tibia). 
​* green ring (on right tibia). 
​* metal ring.

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

note 2 :

Combination of an orange ring with a black two alpha code (on left tibia) and a green ring (on right tibia) and metal ring.

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

note 2 : geologgers will be put on some birds.

Combination of a white ring with a black two alpha code (on left tibia) and a green ring (on right tibia) and metal ring.

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

note 2 :

White ring with a black three alpha-code, starting letter 'C' followed by letter/letter (on left tarsus) and metal ring (on right tarsus).

note 1 :  used codes are : CAA till CZZ. 

note 2 :