Eurasian Oystercatcher

Combination of :
* yellow ring above
* dark-blue ring with a white 2 alpha-numeric or 2 alpha or 2 numeric code (on right tarsus).
* metal ring (on left tarsus).

note 1 : used number/letters are : 0-9 ; A, C, E, H, J, K, L, M, N, P, T, U, V, X, Y.
example :  0A,1A, 2A … A0, A1, A2 ... AA, 11.

note 2 : some 150 oystercatchers were ringed during Feb. '18.

note 3 :

Combination of a coded orange flag (on left tibia) and a red ring (on right tarsus).

note 1 :

Combination of :
* yellow ring (on left tarsus)
​* metal ring (on right tibia)
​* yellow ring with a black three alpha-numeric code (letter/number/number)

note 1 : 

Combination of :
​* white ring with a black three alpha numeric code (on left tarsus)
​* pale-blue ring over metal ring (on right tarsus)

note 1 : used alpha-numeric code is : number/letter/number or number/number/letter.

note 2 : used letter/numbers are : 0 till 9 ; letter 'A' is fixed, always in the middle or last letter.

note 3 :  

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

note 1 : used letters/numbers are : 1 till 9 and A, C, E, H, J, K, L, M, N, P, T, U, V.

note 2 :  

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

note 1 : up to 2014, a total of 80 rings delivered since 2008.

note 2 :

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

note 1 : used letters / numbers are : A, C, E, H, J, K, L, M, N, P, T, U, V, X, Y ; 1-9.

note 2 : birds ringed near Flakstad, Lofoten Islands, Norway.

note 3 : 

Combination of :
- 2 c-rings (on left tarsus)
- white ring with a black two alpha-numeric code
OR
light grey ring with a two alpha-numeric code (on right tarsus)  

note 1 : used letters and numbers are : A, C, E, H, J, K, L, M, N, P, T, U, V, X, Y and from 0 till 9.

note 2 : used colours as c-rings are : yellow, orange, dark-green, lime, red, white and black. 

note 3 : some chicks ringed in 2016 got two cr-rings on left tarsus and a DARK green ring with two black letters on right tarsus.
* used letters are : "YY".
* dark-reen engraved rings only used in 2016 hence no need to read the letters.

note 4 : 

Combination of :
​* orange ring (on left tarsus)
​* white ring with a black two alpha-numeric code (on left tarsus)
​* metal ring (on right tarsus)

note 1 : used numbers are 0 ... 9 and used letters are A, C, E, H, J, K, L, M, N, P, T, U, V.

note 2 : the orange ring is the project-marker ring.

note 3 :

Black ring with a white two alpha-numeric code.

note 1 : used letters are : F, K, L, N, P, R, S, T, U, V, X, Y, Z.

note 2 : used codes since 2018 are : A1-A9; C0-C9; H0-H9, J0-J9.

note 3 : up to 20 ind. to be ringed annually, pulli and adults in inland and Baltic coast colonies, project running 2009-2018.

note 4 : some of the rings are used by Bernd Hermenau, Lower Saxony. Used letters N, K, L and F and ringed a total of 32 birds between 2010 and 2018.

note 5 :