Eurasian Oystercatcher

Black ring with a white two numeric code.

note 1 : used in East Germany and Lower Saxony.

note 2 :

Combination of :
* yellow c-ring with a three numeric code (on right tarsus).
* dark-green ring (on right tibia).
* c-ring (on left tarsus).
* metal ring (on left tarsus).

note 1 : used letters and numbers for alpha-numeric code : 000-999.

note 2 : used colours are : c-ring on left tarsus are dark blue, yellow, white, red and black (niger).

note 3 :

Combination of :
* three c-rings (on left tarsus).
* one c-ring (on right tarsus).
* yellow flag (on right tibia). since 2022 : black flag.
* metal ring (on left tibia).

note 1 : used colours are : yellow, red, white, black (niger), and dark-green.

note 2 : see also : https://cr-birding.org/node/435

note 3 :

Combination of :
* one c-ring (on tibia)
* two c-rings (on tarsus) (on the same leg as above).
* two c-rings (on tarsus) (on other leg).

note 1 : European colour-ring Birding submit

OR

Combination of :
* one or two c-rings (on one leg).
* one striped c-ring (on tarsus of the other leg).

note 1 : European colour-ring Birding submit

Combination of :
* one coded c-ring (on tibia).
* one c-ring (on other tibia).

note 1 :

Combination of :
* one c-ring (on tibia).
* one coded c-ring + one c-ring (on tarsus).

note 1 :

Combination of :
* 2 coded c-rings (one on each leg, tarsus).
* 1 c-ring (on tarsus).

note 1 : European colour-ring Birding submit

OR

Combination of :
* 2 coded c-rings (one on each leg, tarsus).
* 1 c-ring (on tibia).

note 1 : European colour-ring Birding submit

Combination of :
* dark-blue ring with a three numeric code (on right tarsus).
* yellow ring (on right tarsus).
* blue ring (on left tarsus - some birds only).
* metal ring (on left tarsus).

note 1 : used numbers : 001-999

note 2 :

Combination of :
* white flag with a three alpha code (on right tibia).
* red or blue ring (on left tibia).
* metal ring (on left tarsus).

note 1 : used letters : A, C, E, H, N, P, T, U, V, X.

note 2 :

Combination of :
*dark green ring with a two letter code (on right tarsus)
*orange colour ring (on left tarsus)
*metal ring (on left tarsus)

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

note 2 :