Common Kestrel

Red ring with a white three alpha code (on one leg) and metal ring (on the other leg), starting start with letter "A" and colon ":"

note 1 : used codes are A:AA-A:ZZ. 

note 2 : 

Red ring with a white three alpha-numeric code (on one leg) and metal ring (on the other leg), starting start with letter "A" or "B" and colon ":"

note 1 : used codes are :
B:00-B:99, B:AA-B:ZZ , B:1A-B:9Z and B:A1 - B:Z9.
A:00-A:99, A:AA-A:ZZ , A:1A-A:9Z and A:A1-A:Z9.

note 2 : 

Red ring with a white three alpha-numeric code (on left leg) and metal ring (on right leg).
​* letter "A" - letter - number.

note 1 :

Violet ring with a white two alpha-numeric code (on one leg) and metal ring (on other leg).

note 1 : used codes are : A1-Z9 (A1-A9, B1-B9,…, Z1-Z9).

note 2 : 

Violet ring with a white two alpha code (on one leg) and metal ring (on other leg).

note 1 : used codes are : AA-ZZ (AA-AZ, BA-BZ,…, ZA-ZZ).

note 2 :  

Orange wingtag with a black three alpha-numeric code.

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

note 2 : used numbers are 0 - 9.

note 3 : birds ringed since 2017.

note 4 : PVC ring with same code.

note 5 : 

Dark-blue ring with a white 3 alpha code (on left leg) and metal ring (on right leg).

note 1 : codes starting "A"or "B" or "C" or "F"

note 2 : Birds ringed in Southern, Central and NW England.

note 3 :

Red ring with a white three numeric code, first ":" /number/number/number.

note 1 :  

Red ring with a white two alpha code (on one leg) and metal ring (on the other leg).

note 1 : this is a local project (Viennese Kestrel Project).

note 2 : only nestlings are c-ringed in this population.

note 3 : 

Dark-blue ring with a white colon ":" and then three alpha-numeric-code (on one leg) and metal ring (on the other leg).

note 1 : used codes : :A00 - :A99 and :K00 - :K99. 

note 2 :