Common Tern

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

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 2010.

note 4 :

White ring with a black three alpha-numeric code.

note 1 : letter 'V' on first, second or third position.

note 2 : birds ringed since spring 2014 on Griend, The Netherlands.

note 3 :  

Dark-green ring with a white 2 numeric code.

note 1 : this projects is illegaly started in Spain !!

note 2 : this project is not in use.

note 3 : used codes : 00 - 39.

note 4 : used alpha-numeric codes : 0A - 3X.

note 5 : 

Yellow flag with a black two alpha code (on left tarsus) and metal ring (on right tarsus).

note 1 : birds ringed in the UK, North Wales.

note 2 : 

White ring with a black three alpha code, starting letter 'B' (on left leg) and metal ring (on right leg).

note 1 :

White ring with a black three alpha code, starting letter 'M'.

note 1 :

Green ring with a white three alpha code, starting letter 'M'.

note 1 :

Blue ring with a white three alpha code : starting letter 'M'.

note 1 :  

Dark-blue ring with a white three alpha-numeric code, starting letter 'F' followed by two numbers (on left leg) and metal ring (on right leg).   

note 1 : birds ringed on Lake Starnberg : colony on a floating platform.

note 2 :

White legring with a black three alpha code (on tarsus right) and metal ring (on tarus left).

note 1 : to be read from bottom till top.

note 2 :